diff --git a/Dockerfile b/Dockerfile
index bde361082..6382e2ca3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -82,8 +82,8 @@ RUN BUILD_DEPS="nodejs-legacy npm" && \
     DEBIAN_FRONTEND=noninteractive apt-get install -yq $BUILD_DEPS && \
     \
     pip3 install --no-cache-dir /usr/src/jupyter-notebook && \
-    pip2 install widgetsnbextension && \
-    pip3 install widgetsnbextension && \
+    pip2 install --no-cache-dir widgetsnbextension && \
+    pip3 install --no-cache-dir widgetsnbextension && \
     \
     npm cache clean && \
     apt-get clean && \