diff --git a/Dockerfile b/Dockerfile
index c75e277..fc8db7a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.7.2-alpine3.12
+FROM ruby:2.7.2-alpine3.13
 
 ARG VERSION=v3.3.0
 ARG REPOSITORY=tootsuite/mastodon