diff --git a/Dockerfile b/Dockerfile
index 68791c4..4428449 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM node:12
 
 RUN apt-get update && \
-    apt-get upgrade && \
+    apt-get upgrade -y && \
     apt-get install -y libglu1 build-essential && \
     apt-get clean