diff --git a/.ruby-version b/.ruby-version
index bb576dbde..6b4950e3d 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3
+2.4
diff --git a/.travis.yml b/.travis.yml
index db4fad306..7bc30dfe0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: ruby
 
 rvm:
+  - 2.4.1
   - 2.3.4
-  - 2.1.10
 
 env:
   - DB=postgresql BUILD_TYPE=cucumber
diff --git a/Changelog.md b/Changelog.md
index c67932a00..d40a5e03a 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 # 0.7.0.0
 
+## Supported Ruby versions
+
+This release recommends using Ruby 2.4, while retaining Ruby 2.3 as an officially supported version.
+Ruby 2.1 is no longer officially supported.
+
 ## Refactor
 
 * Make the mention syntax more flexible [#7305](https://github.com/diaspora/diaspora/pull/7305)