diff --git a/production.Dockerfile b/production.Dockerfile
index e2e24ebd..9645b61e 100644
--- a/production.Dockerfile
+++ b/production.Dockerfile
@@ -7,11 +7,11 @@ FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim as base
 WORKDIR /rails
 
 # Set production environment
-ENV RAILS_ENV=production \
-    BUNDLE_DEPLOYMENT=1 \
-    BUNDLE_JOBS=4 \
-    BUNDLE_WITHOUT=development,test \
-    BUNDLE_PATH=/usr/local/bundle
+ENV RAILS_ENV="production" \
+    BUNDLE_DEPLOYMENT="1",
+    BUNDLE_JOBS="4",
+    BUNDLE_WITHOUT="development,test",
+    BUNDLE_PATH="/usr/local/bundle"
 
 
 # Throw-away build stage to reduce size of final image