diff --git a/Dockerfile b/Dockerfile
index a710cbaf4cb..fb4c243bf44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ COPY scripts scripts
 COPY emails emails
 
 ENV NODE_ENV production
-RUN ./node_modules/.bin/grunt build
+RUN yarn build
 
 FROM golang:1.15.1-alpine3.12 as go-builder
 
diff --git a/Dockerfile.ubuntu b/Dockerfile.ubuntu
index a4d24559685..9818055bedd 100644
--- a/Dockerfile.ubuntu
+++ b/Dockerfile.ubuntu
@@ -14,7 +14,7 @@ COPY scripts scripts
 COPY emails emails
 
 ENV NODE_ENV production
-RUN ./node_modules/.bin/grunt build
+RUN yarn build
 
 FROM golang:1.15.1 AS go-builder