diff --git a/.gitignore b/.gitignore
index 8bf6481d..f42bf85e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,3 +51,4 @@ result
 result-*
 
 .ccls-cache
+_codeql_detected_source_root
diff --git a/src/modules/custom.cpp b/src/modules/custom.cpp
index d75633e9..a01ca924 100644
--- a/src/modules/custom.cpp
+++ b/src/modules/custom.cpp
@@ -136,7 +136,7 @@ void waybar::modules::Custom::waitingWorker() {
 }
 
 void waybar::modules::Custom::refresh(int sig) {
-  if (sig == SIGRTMIN + config_["signal"].asInt()) {
+  if (config_["signal"].isInt() && sig == SIGRTMIN + config_["signal"].asInt()) {
     thread_.wake_up();
   }
 }
diff --git a/src/modules/image.cpp b/src/modules/image.cpp
index 173aabd3..189deee6 100644
--- a/src/modules/image.cpp
+++ b/src/modules/image.cpp
@@ -41,7 +41,7 @@ void waybar::modules::Image::delayWorker() {
 }
 
 void waybar::modules::Image::refresh(int sig) {
-  if (sig == SIGRTMIN + config_["signal"].asInt()) {
+  if (config_["signal"].isInt() && sig == SIGRTMIN + config_["signal"].asInt()) {
     thread_.wake_up();
   }
 }