diff --git a/.ruby-version b/.ruby-version
index 437459cd9..73462a5a1 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.5.0
+2.5.1
diff --git a/.travis.yml b/.travis.yml
index 576659aaf..989237a19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ addons:
       - yarn
 
 rvm:
-  - 2.4.2
+  - 2.4.3
   - 2.5.0
 
 services:
diff --git a/Dockerfile b/Dockerfile
index 0801f5747..5f17c5b89 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.4.3-alpine3.6
+FROM ruby:2.4.4-alpine3.6
 
 LABEL maintainer="https://github.com/tootsuite/mastodon" \
       description="Your self-hosted, globally interconnected microblogging community"