diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8806058..876a6be 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,10 +1,10 @@
 production:
-  image: java:8
+  image: "java:8"
   variables:
-      ESPURL: "http://arduino.esp8266.com/stable/package_esp8266com_index.json"
-      MEMORY: "custom_FlashSize=nodemcuv2_4M3M"
+      ESPURL:    "http://arduino.esp8266.com/stable/package_esp8266com_index.json"
+      MEMORY:    "custom_FlashSize=nodemcuv2_4M3M"
       INSTBOARD: "esp8266:esp8266"
-      BOARD: "${INSTBOARD}:nodemcuv2"
+      BOARD:     "${INSTBOARD}:nodemcuv2"
   before_script:
       - apt update
       - cd /