diff --git a/pre_cache_action.sh b/pre_cache_action.sh
index 4b3ff4b..0c23930 100755
--- a/pre_cache_action.sh
+++ b/pre_cache_action.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 # Debug mode for diagnosing issues.
 # Setup first before other operations.
 debug="${4}"