diff --git a/Dockerfile b/Dockerfile
index 83028fe0b..846deb59c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ ARG GITHUB_EMAIL
 
 RUN npm install -g npm-cli-login
 
-RUN npm-cli-login -r=https://npm.pkg.github.com -u=${GITHUB_USERNAME} -p=${GITHUB_PASS} -e=${GITHUB_EMAIL}
+RUN npm-cli-login -r=https://npm.pkg.github.com -u=$GITHUB_USERNAME -p=$GITHUB_PASS -e=$GITHUB_EMAIL
 
 RUN npm install