diff --git a/.github/workflows/gempush.yml b/.github/workflows/gempush.yml
index 13f8f13..cb51822 100644
--- a/.github/workflows/gempush.yml
+++ b/.github/workflows/gempush.yml
@@ -13,24 +13,20 @@ jobs:
     name: Spec
     runs-on: ${{ matrix.runner }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.3.0
       with:
         submodules: true
-    - uses: ruby/setup-ruby@v1
+    - uses: ruby/setup-ruby@v1.138.0
       with:
         ruby-version: ${{ matrix.ruby }}
     - run: rake spec steep
     strategy:
       matrix:
-        ruby: [3.2.0-preview1, 3.1.2, 3.0.4, 2.7.6]
+        ruby: [3.2.1, 3.1.3, 3.0.5, 2.7.7]
         runner:
           - macos-11
-          - ubuntu-18.04
+          - macos-12
           - ubuntu-20.04
+          - ubuntu-22.04
           - windows-2019
           - windows-2022
-        exclude:
-          - ruby: 3.2.0-preview1
-            runner: windows-2019
-          - ruby: 3.2.0-preview1
-            runner: windows-2022
diff --git a/cld3.gemspec b/cld3.gemspec
index 7af5b8f..5542de0 100644
--- a/cld3.gemspec
+++ b/cld3.gemspec
@@ -24,9 +24,9 @@ Gem::Specification.new do |gem|
   gem.author = "Akihiko Odaki"
   gem.email = "akihiko.odaki@gmail.com"
   gem.required_ruby_version = [ ">= 2.7.0", "< 3.3.0" ]
-  gem.add_development_dependency "rbs", [ ">= 2.6.0", "< 2.7.0" ]
-  gem.add_development_dependency "rspec", [ ">= 3.11.0", "< 3.12.0" ]
-  gem.add_development_dependency "steep", [ ">= 1.0.0", "< 1.1.0" ]
+  gem.add_development_dependency "rbs", [ ">= 2.8.0", "< 2.9.0" ]
+  gem.add_development_dependency "rspec", [ ">= 3.12.0", "< 3.13.0" ]
+  gem.add_development_dependency "steep", [ ">= 1.3.0", "< 1.4.0" ]
   gem.files = Dir[
     "Gemfile", "LICENSE", "LICENSE_CLD3", "README.md",
     "cld3.gemspec", "ext/**/*.c", "ext/**/*.cc", "ext/**/*.h",
diff --git a/sig/cld3.rbs b/sig/cld3.rbs
index fcba760..17924aa 100644
--- a/sig/cld3.rbs
+++ b/sig/cld3.rbs
@@ -36,6 +36,8 @@ module CLD3
       attr_accessor byte_ranges(): Array[SpanInfo]
     end
 
+    @cc: untyped
+
     def initialize: (?Integer, ?Integer) -> void
     def find_language: (String) -> Result?
     def find_top_n_most_freq_langs: (String, Integer) -> Array[Result]