diff --git a/.github/workflows/stable_api.yml b/.github/workflows/stable_api.yml
index e563b13..8e82777 100644
--- a/.github/workflows/stable_api.yml
+++ b/.github/workflows/stable_api.yml
@@ -8,11 +8,10 @@ jobs:
     strategy:
       matrix:
         ruby:
+          - '3.0'
           - '3.1'
           - '3.2'
           - '3.3'
-          - jruby
-          - truffleruby
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby ${{ matrix.ruby }}
diff --git a/README.md b/README.md
index 8daddf4..a347a45 100644
--- a/README.md
+++ b/README.md
@@ -153,9 +153,9 @@ On macOS using Homebrew, run:
 
 ### Supported Rubies
 
-* MRI (3.1, 3.2, 3.3)
-* JRuby
-* TruffleRuby
+At least:
+
+* Ruby 3.0, 3.1, 3.2, 3.3
 
 ## Installation