diff --git a/result/Dockerfile b/result/Dockerfile
index 4fb74e8ca7..33f0ba86fb 100644
--- a/result/Dockerfile
+++ b/result/Dockerfile
@@ -18,7 +18,7 @@ RUN npm ci && \
 
 COPY . .
 
-ENV PORT 80
+ENV PORT=80
 EXPOSE 80
 
 ENTRYPOINT ["/usr/bin/tini", "--"]