diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bd80320..fdcaad3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,6 @@ jobs:
           - "ruby-3.3"
           - "ruby-head"
           # https://github.com/jruby/jruby/discussions/7915
-          - "jruby-9.3"
           - "jruby-9.4"
           - "jruby-head"
     name: "Test (Ruby ${{ matrix.ruby }})"
diff --git a/README.md b/README.md
index 82dd0c5..f7eb1fb 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ implementations:
 - Ruby 3.1
 - Ruby 3.2
 - Ruby 3.3
-- [JRuby][]
+- [JRuby 9.4][jruby]
 
 If something doesn't work in one of these implementations, it's a bug.