diff --git a/update-Nitrov3.sh b/update-Nitrov3.sh
index 703c7f5..cbe88f0 100755
--- a/update-Nitrov3.sh
+++ b/update-Nitrov3.sh
@@ -65,7 +65,13 @@ echo "--> Building Emulator with Maven..."
 mvn package
 
 # Automatically detect the newly built .jar file
-JAR_FILE=$(basename "$(ls -t target/Habbo-*-jar-with-dependencies.jar 2>/dev/null | head -n 1)")
+JAR_PATTERN="target/Habbo-*-jar-with-dependencies.jar"
+JAR_FILE=$(basename "$(ls -t $JAR_PATTERN 2>/dev/null | head -n 1)")
+
+if [ -z "$JAR_FILE" ]; then
+    echo "=== ❌ Geen jar-bestand gevonden met pattern: $JAR_PATTERN ==="
+    exit 1
+fi
 
 echo "--> Found jar file: $JAR_FILE"
 echo "--> Updating emulator launch file..."