diff --git a/MissileWars/src/de/steamwar/misslewars/items/CustomItem.java b/MissileWars/src/de/steamwar/misslewars/items/CustomItem.java
index 9f36760a..5ada1c6d 100644
--- a/MissileWars/src/de/steamwar/misslewars/items/CustomItem.java
+++ b/MissileWars/src/de/steamwar/misslewars/items/CustomItem.java
@@ -69,6 +69,7 @@ public class CustomItem extends SpecialItem {
         }
         for (File itemFile : Objects.requireNonNull(itemsFolder.listFiles())) {
             if (!itemFile.canRead() || !itemFile.isFile()) continue;
+            if (!itemFile.getName().endsWith(".json")) continue;
             try {
                 JsonObject jsonObject = new JsonParser().parse(new FileReader(itemFile)).getAsJsonObject();
                 new CustomItem(new ScriptedItem(jsonObject));