diff --git a/ApplyClusterAndAcquireLock.sh b/ApplyClusterAndAcquireLock.sh
index fda4ebca..4444c479 100755
--- a/ApplyClusterAndAcquireLock.sh
+++ b/ApplyClusterAndAcquireLock.sh
@@ -15,7 +15,7 @@ GKE_ZONE=$3
 sudo sh -c "curl https://raw.githubusercontent.com/kadwanev/retry/master/retry -o /usr/local/bin/retry && chmod +x /usr/local/bin/retry"
 
 attempts=0
-while [ "$attempts" == "0" ]
+while [ $attempts -gt 0 ]
 do
 retry -s 15 -t 20 -v '
     STATUS=$(gcloud container clusters list --format="json" --project $GKE_PROJECT |
@@ -63,5 +63,5 @@ metadata:
     app: unity-builder
 EOF && exit 0
 
-attempts=attempts+1
+attempts=$(($attempts+1))
 done