diff --git a/Dockerfile b/Dockerfile
index bd12016..104763a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN GOBIN=/mi/bin go install ./cmd/...
 FROM xena/elm:0.19.1 AS elm
 WORKDIR /mi
 COPY ./frontend .
-RUN elm make --output main.js src/Main.elm
+RUN elm make --output main.js src/Main.elm --optimize
 
 FROM xena/alpine
 COPY --from=go /mi/bin /usr/local/bin