diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 869fdad..66ef1de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.2', '3.3']
+        ruby: ['3.2', '3.3', '4.0']
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
diff --git a/Gemfile.lock b/Gemfile.lock
index 560fdd9..a97593d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rspock (2.0.0)
+    rspock (2.1.0)
       ast_transform (~> 2.0)
       minitest (~> 5.0)
       mocha (>= 1.0)
diff --git a/lib/rspock/version.rb b/lib/rspock/version.rb
index 7ef42b4..01003f2 100644
--- a/lib/rspock/version.rb
+++ b/lib/rspock/version.rb
@@ -1,3 +1,3 @@
 module RSpock
-  VERSION = "2.0.0"
+  VERSION = "2.1.0"
 end