diff --git a/Dockerfile b/Dockerfile
index 0ae7509..50d0129 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
 FROM alpine:latest as build
 
-ENV REACT_APP_FIREBASE_API_KEY = $REACT_APP_FIREBASE_API_KEY
-ENV REACT_APP_FIREBASE_APP_ID = $REACT_APP_FIREBASE_APP_ID
-ENV REACT_APP_ENVIRONMENT = $REACT_APP_ENVIRONMENT
+ENV REACT_APP_FIREBASE_API_KEY = ${REACT_APP_FIREBASE_API_KEY}
+ENV REACT_APP_FIREBASE_APP_ID = ${REACT_APP_FIREBASE_APP_ID}
+ENV REACT_APP_ENVIRONMENT = ${REACT_APP_ENVIRONMENT}
 
 RUN apk add --update nodejs npm
 RUN npm install --global yarn