diff --git a/deploy.sh b/deploy.sh
index 11e37890..d59ae7bc 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -21,7 +21,7 @@ if $(git rev-parse --is-shallow-repository); then
   git fetch --unshallow
 fi
 BUILD_NUMBER=$(git rev-list --since=${COMMIT_DATE}T00:00:00Z --first-parent --count ${COMMIT_SHA})
-BUILD_ID2=${COMMIT_DATE//-/.}.${BUILD_NUMBER}
+BUILD_ID2=${COMMIT_DATE//-/.}-${BUILD_NUMBER}
 
 docker tag ${TAG}:${COMMIT_SHA} ${TAG}:${BUILD_ID}
 docker tag ${TAG}:${COMMIT_SHA} ${TAG}:${BUILD_ID2}