diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 21a8c68fcf..f3f3d11459 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -11,14 +11,14 @@ on:
 
 jobs:
   benchmark:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
 
       - name: Setup Node.js environment
         uses: actions/setup-node@v4
         with:
-          node-version: '*'
+          node-version: '22'
           cache: 'npm'
           check-latest: true
 
diff --git a/.github/workflows/fossa.yml b/.github/workflows/fossa.yml
index 1221aaa4c8..364b889cf2 100644
--- a/.github/workflows/fossa.yml
+++ b/.github/workflows/fossa.yml
@@ -12,7 +12,7 @@ defaults:
 
 jobs:
   fossa:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/.github/workflows/pre-release.yml b/.github/workflows/pre-release.yml
index e23983c9cc..638bf2a041 100644
--- a/.github/workflows/pre-release.yml
+++ b/.github/workflows/pre-release.yml
@@ -6,14 +6,14 @@ on:
       - releases/*/*/*
 jobs:
   prerelease:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-node@v4
         with:
-          node-version: '*'
+          node-version: '22'
           check-latest: true
           registry-url: 'https://registry.npmjs.org'
       - name: Extract tag, version and package
diff --git a/.github/workflows/stalebot.yml b/.github/workflows/stalebot.yml
index 868fb1d840..9abdf847e5 100644
--- a/.github/workflows/stalebot.yml
+++ b/.github/workflows/stalebot.yml
@@ -5,7 +5,7 @@ on:
 
 jobs:
   stale:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/stale@v6.0.1
         with:
diff --git a/.github/workflows/typescript-nudge.yml b/.github/workflows/typescript-nudge.yml
index bb1c0b0b5b..36fb1d7a55 100644
--- a/.github/workflows/typescript-nudge.yml
+++ b/.github/workflows/typescript-nudge.yml
@@ -10,7 +10,7 @@ on:
 name: TypeScript conversion nudge
 jobs:
   Nudge-to-convert-to-TypeScript-if-JavaScript-found:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
         with:
diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 4c60515f1b..d99a187e7c 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -8,7 +8,7 @@ on:
   merge_group:
 jobs:
   e2e:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 60
     steps:
       # Sets an output parameter if this is a release PR
@@ -27,7 +27,7 @@ jobs:
         if: ${{ !steps.release-check.outputs.IS_RELEASE }}
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 22
         if: ${{ !steps.release-check.outputs.IS_RELEASE }}
       - name: Install dependencies
         run: npm ci
@@ -49,12 +49,13 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        os: [ubuntu-latest, macOS-latest, windows-latest]
-        node-version: ['*']
+        os: [ubuntu-24.04, macos-14, windows-2022]
+        node-version: ['22']
         # Must include the minimum deno version from the `DENO_VERSION_RANGE` constant in `node/bridge.ts`.
         deno-version: ['v1.39.0', 'v1.46.3']
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
+            # Earliest supported version
             node-version: '14.16.0'
             deno-version: 'v1.46.3'
       fail-fast: false
@@ -63,7 +64,7 @@ jobs:
       # https://github.com/actions/virtual-environments/issues/268
       - name: Increase open file limit
         run: sudo ulimit -Sn 65536
-        if: "${{ matrix.os == 'macOS-latest' }}"
+        if: "${{ matrix.os == 'macos-14' }}"
       - run: git config --global core.symlinks true
       # Sets an output parameter if this is a release PR
       - name: Check for release
@@ -121,30 +122,30 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        os: [ubuntu-latest, macOS-latest, windows-latest]
-        node-version: ['*']
+        os: [ubuntu-24.04, macos-14, windows-2022]
+        node-version: ['22']
         install-command: ['npm ci']
         machine: ['0', '1', '2', '3', '4']
         include:
           # We test on the oldest supported Node.js version, but only with a
           # single combination (Ubuntu)
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             node-version: '14.16.0'
             install-command: npm ci
             machine: '0'
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             node-version: '14.16.0'
             install-command: npm ci
             machine: '1'
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             node-version: '14.16.0'
             install-command: npm ci
             machine: '2'
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             node-version: '14.16.0'
             install-command: npm ci
             machine: '3'
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             node-version: '14.16.0'
             install-command: npm ci
             machine: '4'