diff --git a/.gitignore b/.gitignore
index ba7d8990..6b5c70a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,8 +7,14 @@
 !gradle/wrapper/gradle-wrapper.jar
 steamwar.properties
 
+# Kotlin
+.kotlin
+
 # IntelliJ IDEA
 *.iml
+.idea
+!.idea/copyright
+!.idea/runConfigurations
 
 # VSCode
 bin/