diff --git a/client/Dockerfile b/client/Dockerfile
index 2abfae5..d0d5545 100644
--- a/client/Dockerfile
+++ b/client/Dockerfile
@@ -10,6 +10,7 @@ COPY package.json yarn.lock .yarnrc.yml ./
 RUN yarn install
 COPY . .
 
+ARG COMMIT_SHA=unknown
 ENV COMMIT_SHA=$COMMIT_SHA
 
 RUN yarn generate