diff --git a/cloud-deploy-pipeline.groovy b/cloud-deploy-pipeline.groovy
index bb0890f..2a63e2e 100644
--- a/cloud-deploy-pipeline.groovy
+++ b/cloud-deploy-pipeline.groovy
@@ -110,6 +110,9 @@
                     }
                 }
 
+                // no underscore in STACK_NAME
+                STACK_NAME = STACK_NAME.replaceAll('_', '-')
+
                 // set description
                 currentBuild.description = "${STACK_NAME}"