diff --git a/index.js b/index.js
index 68cd571..7a4bc62 100644
--- a/index.js
+++ b/index.js
@@ -38,7 +38,7 @@ const ecs = new AWS.ECS({
   let image = taskDefinition.taskDefinition.containerDefinitions[0].image
   console.log('show image :: ', image)
   if (typeof gitHash === 'string' && gitHash.length > 0) {
-    image = image.split(':')[0] + ':' gitHash
+    image = image.split(':')[0] + ':' + gitHash
     taskDefinition.taskDefinition.containerDefinitions[0].image = image
   }
   console.log('show new image :: ', image)