diff --git a/Dockerfile b/Dockerfile
index a19e9acfb..bc2f7e6dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:latest
+FROM node:14
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
@@ -11,7 +11,8 @@ ENV PATH=$NPM_CONFIG_PREFIX/bin:$PATH
 USER node
 
 RUN npm --loglevel=warn install -g \
-    assetgraph-builder \
-    svgo
+        assetgraph-builder \
+        svgo \
+    && npm cache clean --force
 
 ENTRYPOINT ["buildProduction"]