diff --git a/Dockerfile b/Dockerfile
index c333dee..e502105 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,7 @@ RUN dart pub get
 
 # Copy app source code (except anything in .dockerignore) and AOT compile app.
 COPY . .
+RUN dart pub get --offline
 RUN dart compile exe bin/server.dart -o bin/server
 
 # Build minimal serving image from AOT-compiled `/server`