diff --git a/Dockerfile b/Dockerfile
index fe39d98..535d3bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ WORKDIR /usr/src/app
 
 # install dependencies
 RUN apt update && \
-    apt install -y ruby ruby-dev rpm \
+    apt install -y ruby ruby-dev rpm && \
     gem install sass
 
 # make sure node_modules and public exist so we can ensure it's own by the right user