diff --git a/Dockerfile b/Dockerfile
index afa4f12ac2..b09193fc4d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,14 +3,15 @@
 #
 # To run this Docker container interactively: docker run -it fpm
 #
-FROM alpine:3.7
+FROM alpine:3.12
 
 RUN apk add --no-cache \
         ruby \
         ruby-dev \
+        ruby-etc \
         gcc \
         libffi-dev \
         make \
         libc-dev \
         rpm \
-    && gem install --no-ri --no-rdoc fpm
+    && gem install --no-document fpm