diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e29f7b..dcf5449 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * __Drop support for Ruby 2.3 and 2.4__
 * __[Security]__ Bump nokogiri from 1.10.10 to 1.11.1
 * __[Security]__ Bump redcarpet from 3.5.0 to 3.5.1
+* Specify slate is not supported on Ruby 3.x
 * Bump rouge from 3.24.0 to 3.26.0
 
 *October 27, 2020*
diff --git a/Gemfile b/Gemfile
index c71cf80..a10cfaf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-ruby '>=2.5.0'
+ruby '~> 2.5'
 source 'https://rubygems.org'
 
 # Middleman