diff --git a/Plan/common/src/main/java/com/djrapitops/plan/utilities/file/FileWatcher.java b/Plan/common/src/main/java/com/djrapitops/plan/utilities/file/FileWatcher.java
index a1bef60ae..53eeced16 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/utilities/file/FileWatcher.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/utilities/file/FileWatcher.java
@@ -116,7 +116,7 @@ public class FileWatcher extends Thread {
     }
 
     private void actOnModification(Path modifiedFile) {
-        for (WatchedFile watchedFile : watchedFiles) {
+        for (WatchedFile watchedFile : new HashSet<>(watchedFiles)) {
             watchedFile.modified(modifiedFile);
         }
     }