diff --git a/Dockerfile b/Dockerfile
index 09398d9..d1a9068 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ RUN npm install -g npm@8.4.0
 RUN npm install -g @angular/cli
 COPY ui /ui
 WORKDIR ui
-RUN npm install && ng build --configuration=${MODE}
+RUN npm install && ng build --configuration=$MODE
 
 
 FROM golang:alpine AS GO_BUILD