diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c64b4c4..47c5c66 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [2.3, 2.7]
+        ruby: [2.7]
     name: install dependencies and run tests
     steps:
       - name: install image processing dependencies
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 005830c..04eb8d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## Unreleased
 ### Removed
 - support for Ruby 2.0 (and illusion of it being tested by CI)
+- support for Ruby 2.3
 
 ## [0.13.0] 16.12.2020
 ### Fixed