diff --git a/backend/cmd/main.go b/backend/cmd/main.go
index 1fb5fb1..b1c1b82 100644
--- a/backend/cmd/main.go
+++ b/backend/cmd/main.go
@@ -1,7 +1,24 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 // @title           Easywish client API
 // @version         1.0
 // @description     Easy and feature-rich wishlist.
-// @license.name  	GPL 3.0
+// @license.name  	GPL-3.0
 
 // @BasePath  			/api/
 // @Schemes					http
@@ -90,4 +107,3 @@ func main() {
 
   ).Run()
 }
-
diff --git a/backend/config/config.go b/backend/config/config.go
index ff3b42b..35814ba 100644
--- a/backend/config/config.go
+++ b/backend/config/config.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package config
 
 import (
diff --git a/backend/docs/docs.go b/backend/docs/docs.go
index 137d474..c1ebf38 100644
--- a/backend/docs/docs.go
+++ b/backend/docs/docs.go
@@ -299,6 +299,10 @@ const docTemplate = `{
         },
         "models.LoginRequest": {
             "type": "object",
+            "required": [
+                "password",
+                "username"
+            ],
             "properties": {
                 "password": {
                     "type": "string"
@@ -324,6 +328,10 @@ const docTemplate = `{
         },
         "models.RegistrationBeginRequest": {
             "type": "object",
+            "required": [
+                "password",
+                "username"
+            ],
             "properties": {
                 "email": {
                     "type": "string"
@@ -333,7 +341,9 @@ const docTemplate = `{
                     "type": "string"
                 },
                 "username": {
-                    "type": "string"
+                    "type": "string",
+                    "maxLength": 20,
+                    "minLength": 3
                 }
             }
         }
diff --git a/backend/docs/swagger.json b/backend/docs/swagger.json
index b1d469a..8868dde 100644
--- a/backend/docs/swagger.json
+++ b/backend/docs/swagger.json
@@ -295,6 +295,10 @@
         },
         "models.LoginRequest": {
             "type": "object",
+            "required": [
+                "password",
+                "username"
+            ],
             "properties": {
                 "password": {
                     "type": "string"
@@ -320,6 +324,10 @@
         },
         "models.RegistrationBeginRequest": {
             "type": "object",
+            "required": [
+                "password",
+                "username"
+            ],
             "properties": {
                 "email": {
                     "type": "string"
@@ -329,7 +337,9 @@
                     "type": "string"
                 },
                 "username": {
-                    "type": "string"
+                    "type": "string",
+                    "maxLength": 20,
+                    "minLength": 3
                 }
             }
         }
diff --git a/backend/docs/swagger.yaml b/backend/docs/swagger.yaml
index 66a9a37..eebc2bf 100644
--- a/backend/docs/swagger.yaml
+++ b/backend/docs/swagger.yaml
@@ -13,6 +13,9 @@ definitions:
         type: string
       username:
         type: string
+    required:
+    - password
+    - username
     type: object
   models.LoginResponse:
     properties:
@@ -29,7 +32,12 @@ definitions:
         description: 'TODO: password checking'
         type: string
       username:
+        maxLength: 20
+        minLength: 3
         type: string
+    required:
+    - password
+    - username
     type: object
 info:
   contact: {}
diff --git a/backend/internal/controllers/account.go b/backend/internal/controllers/account.go
index 210c562..3f2e1d3 100644
--- a/backend/internal/controllers/account.go
+++ b/backend/internal/controllers/account.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
@@ -15,4 +32,3 @@ import (
 func ChangePassword(c *gin.Context) {
 	c.Status(http.StatusNotImplemented)
 }
-
diff --git a/backend/internal/controllers/auth.go b/backend/internal/controllers/auth.go
index 0a6cb77..98e01f3 100644
--- a/backend/internal/controllers/auth.go
+++ b/backend/internal/controllers/auth.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
diff --git a/backend/internal/controllers/profile.go b/backend/internal/controllers/profile.go
index 08aeeaf..c1bee1a 100644
--- a/backend/internal/controllers/profile.go
+++ b/backend/internal/controllers/profile.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
diff --git a/backend/internal/controllers/router.go b/backend/internal/controllers/router.go
index 1256a3b..20731b5 100644
--- a/backend/internal/controllers/router.go
+++ b/backend/internal/controllers/router.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
diff --git a/backend/internal/controllers/service.go b/backend/internal/controllers/service.go
index 923856a..d0012a4 100644
--- a/backend/internal/controllers/service.go
+++ b/backend/internal/controllers/service.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
diff --git a/backend/internal/controllers/setup.go b/backend/internal/controllers/setup.go
index 5b64227..5f4ba0a 100644
--- a/backend/internal/controllers/setup.go
+++ b/backend/internal/controllers/setup.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package controllers
 
 import (
diff --git a/backend/internal/database/dbContext.go b/backend/internal/database/dbContext.go
index 08676f8..64edb54 100644
--- a/backend/internal/database/dbContext.go
+++ b/backend/internal/database/dbContext.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package database
 
 import (
diff --git a/backend/internal/database/helper.go b/backend/internal/database/helper.go
index 36f7722..f008b49 100644
--- a/backend/internal/database/helper.go
+++ b/backend/internal/database/helper.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package database
 
 import (
diff --git a/backend/internal/database/setup.go b/backend/internal/database/setup.go
index 0679236..ceef387 100644
--- a/backend/internal/database/setup.go
+++ b/backend/internal/database/setup.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package database 
 
 import (
@@ -9,5 +26,3 @@ var Module = fx.Module("database",
 			NewDbContext,
     ),
 )
-
-
diff --git a/backend/internal/errors/auth.go b/backend/internal/errors/auth.go
index 55d13cf..5d2a4f1 100644
--- a/backend/internal/errors/auth.go
+++ b/backend/internal/errors/auth.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package errors
 
 import (
diff --git a/backend/internal/errors/general.go b/backend/internal/errors/general.go
index cbb6213..e3bdc79 100644
--- a/backend/internal/errors/general.go
+++ b/backend/internal/errors/general.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package errors
 
 import (
@@ -8,4 +25,3 @@ var (
 	ErrNotImplemented = errors.New("Feature is not implemented")
 	ErrBadRequest = errors.New("Bad request")
 )
-
diff --git a/backend/internal/logger/logger.go b/backend/internal/logger/logger.go
index 5bac938..c0068a5 100644
--- a/backend/internal/logger/logger.go
+++ b/backend/internal/logger/logger.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package logger
 
 import (
diff --git a/backend/internal/middleware/auth.go b/backend/internal/middleware/auth.go
index 1cca2b7..db5fd0e 100644
--- a/backend/internal/middleware/auth.go
+++ b/backend/internal/middleware/auth.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package middleware
 
 import (
diff --git a/backend/internal/models/auth.go b/backend/internal/models/auth.go
index b759276..df54000 100644
--- a/backend/internal/models/auth.go
+++ b/backend/internal/models/auth.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package models
 
 type Tokens struct {
diff --git a/backend/internal/routes/router.go b/backend/internal/routes/router.go
index abda7f2..c4c0cb4 100644
--- a/backend/internal/routes/router.go
+++ b/backend/internal/routes/router.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package routes
 
 import (
diff --git a/backend/internal/routes/setup.go b/backend/internal/routes/setup.go
index 3bfc0c0..5a1e8f7 100644
--- a/backend/internal/routes/setup.go
+++ b/backend/internal/routes/setup.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package routes
 
 import (
diff --git a/backend/internal/services/auth.go b/backend/internal/services/auth.go
index bec05fd..bccaa75 100644
--- a/backend/internal/services/auth.go
+++ b/backend/internal/services/auth.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package services
 
 import (
diff --git a/backend/internal/services/setup.go b/backend/internal/services/setup.go
index d93e5b0..5589100 100644
--- a/backend/internal/services/setup.go
+++ b/backend/internal/services/setup.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package services
 
 import (
@@ -9,4 +26,3 @@ var Module = fx.Module("services",
 			NewAuthService,
     ),
 )
-
diff --git a/backend/internal/utils/db.go b/backend/internal/utils/db.go
index 3c735b9..6ebcc09 100644
--- a/backend/internal/utils/db.go
+++ b/backend/internal/utils/db.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package utils
 
 import (
diff --git a/backend/internal/utils/enums/enums.go b/backend/internal/utils/enums/enums.go
index 1861b2e..ca5ccd9 100644
--- a/backend/internal/utils/enums/enums.go
+++ b/backend/internal/utils/enums/enums.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package enums
 
 type ConfirmationCodeType int32
diff --git a/backend/internal/utils/jwt.go b/backend/internal/utils/jwt.go
index 51abdaa..bf25213 100644
--- a/backend/internal/utils/jwt.go
+++ b/backend/internal/utils/jwt.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package utils
 
 import (
diff --git a/backend/internal/utils/security.go b/backend/internal/utils/security.go
index 2983f02..e4f968a 100644
--- a/backend/internal/utils/security.go
+++ b/backend/internal/utils/security.go
@@ -1,3 +1,20 @@
+// Copyright (c) 2025 Nikolai Papin
+// 
+// This file is part of Easywish
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+// the GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package utils
 
 import (