diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
index 3dbf135736..94560551a0 100644
--- a/.github/workflows/baseruby.yml
+++ b/.github/workflows/baseruby.yml
@@ -30,7 +30,7 @@ jobs:
   baseruby:
     name: BASERUBY
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
diff --git a/.github/workflows/rjit-bindgen.yml b/.github/workflows/rjit-bindgen.yml
index c2ec4a6a68..f5c2176f7d 100644
--- a/.github/workflows/rjit-bindgen.yml
+++ b/.github/workflows/rjit-bindgen.yml
@@ -33,7 +33,7 @@ jobs:
           - task: rjit-bindgen
       fail-fast: false
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
diff --git a/.github/workflows/spec_guards.yml b/.github/workflows/spec_guards.yml
index 30dbcd660f..c08cf2ff88 100644
--- a/.github/workflows/spec_guards.yml
+++ b/.github/workflows/spec_guards.yml
@@ -24,7 +24,7 @@ jobs:
   rubyspec:
     name: Rubyspec
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
diff --git a/.github/workflows/wasm.yml b/.github/workflows/wasm.yml
index 3924aaeb99..1cda4f9571 100644
--- a/.github/workflows/wasm.yml
+++ b/.github/workflows/wasm.yml
@@ -48,7 +48,7 @@ jobs:
       BINARYEN_VERSION: 113
       WASMTIME_VERSION: v15.0.0
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
index f1c62c6c77..34b3ea0ce8 100644
--- a/.github/workflows/yjit-ubuntu.yml
+++ b/.github/workflows/yjit-ubuntu.yml
@@ -25,7 +25,7 @@ jobs:
     name: cargo test
 
     # GitHub Action's image seems to already contain a Rust 1.58.0.
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
@@ -57,7 +57,7 @@ jobs:
     name: cargo clippy
 
     # GitHub Action's image seems to already contain a Rust 1.58.0.
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
@@ -114,7 +114,7 @@ jobs:
       BUNDLE_JOBS: 8 # for yjit-bench
       RUST_BACKTRACE: 1
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     if: >-
       ${{!(false
@@ -172,7 +172,7 @@ jobs:
       - name: Set up Launchable
         uses: ./.github/actions/launchable/setup
         with:
-          os: ubuntu-20.04
+          os: ubuntu-22.04
           test-opts: ${{ matrix.configure }}
           launchable-token: ${{ secrets.LAUNCHABLE_TOKEN }}
           builddir: build