diff --git a/Jenkinsfile.pjt b/Jenkinsfile.pjt
index 3e8ed9a..f1a5480 100644
--- a/Jenkinsfile.pjt
+++ b/Jenkinsfile.pjt
@@ -238,7 +238,7 @@ pipeline {
             echo "[1/2] docker registry login"
             echo "$DOCKER_PASS" | docker login ${REGISTRY_HOST} -u "$DOCKER_USER" --password-stdin
 
-            curl -u $DOCKER_USER:$DOCKER_PASS https://${REGISTRY_HOST}/v2/${IMAGE_REPO}/tags/list
+            curl -u "$DOCKER_USER":"$DOCKER_PASS" https://${REGISTRY_HOST}/v2/${IMAGE_REPO}/tags/list
 
             docker logout ${REGISTRY_HOST}
           '''