diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index b7342b7b25c..fbe273d58b0 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -50,7 +50,7 @@ jobs:
     runs-on: ${{ inputs.runner }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
@@ -116,7 +116,7 @@ jobs:
     name: Test compiler and stdlib (batch ${{ matrix.batch.display }}/${{ matrix.num-batch }})
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
@@ -195,7 +195,7 @@ jobs:
     runs-on: ${{ inputs.runner }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 17625531365..91e01ba678a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -127,7 +127,7 @@ jobs:
     runs-on: ${{ needs.pre_run.outputs.linux_runner }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
@@ -203,7 +203,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
diff --git a/.github/workflows/compatibility.yml b/.github/workflows/compatibility.yml
index cd5eab4474c..938f1f9ac23 100644
--- a/.github/workflows/compatibility.yml
+++ b/.github/workflows/compatibility.yml
@@ -36,7 +36,7 @@ jobs:
     if: ${{ !github.event.pull_request.draft }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 5eda57c6684..905a6bc907b 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -34,7 +34,7 @@ jobs:
       DOC_TARGET: x86_64-linux-gnu
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup latest compiler
         uses: nim-works/setup-nimskull@0.1.2
diff --git a/.github/workflows/leak.yml b/.github/workflows/leak.yml
index e633c55a876..2831ecdd93d 100644
--- a/.github/workflows/leak.yml
+++ b/.github/workflows/leak.yml
@@ -18,7 +18,7 @@ jobs:
         # Works around https://github.com/actions/runner-images/issues/9491
         run: sudo sysctl vm.mmap_rnd_bits=28
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index 2aa31ef6b28..7968fb915d7 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -30,7 +30,7 @@ jobs:
     steps:
       - name: Checkout (for Git build)
         if: inputs.source-archive == ''
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
@@ -43,7 +43,7 @@ jobs:
 
       - name: Get actions (for source-archive builds)
         if: inputs.source-archive != ''
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: git-src
           sparse-checkout: .github/actions
diff --git a/.github/workflows/publisher.yml b/.github/workflows/publisher.yml
index e433d37f4a1..bbd2000a1c9 100644
--- a/.github/workflows/publisher.yml
+++ b/.github/workflows/publisher.yml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
       # Repository required for changelog builder
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           sparse-checkout: |
diff --git a/.github/workflows/reproducible.yml b/.github/workflows/reproducible.yml
index 1bece172481..8543302a4c9 100644
--- a/.github/workflows/reproducible.yml
+++ b/.github/workflows/reproducible.yml
@@ -67,7 +67,7 @@ jobs:
           # On the contrary, reprotest needs all of those deps to work
           sudo apt-get install -yqq reprotest
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           filter: tree:0
diff --git a/.github/workflows/slash-command-generate-changelog.yml b/.github/workflows/slash-command-generate-changelog.yml
index 6ef198a0059..91a67ac3ed2 100644
--- a/.github/workflows/slash-command-generate-changelog.yml
+++ b/.github/workflows/slash-command-generate-changelog.yml
@@ -36,7 +36,7 @@ jobs:
           exit 1
 
       - name: "Checkout merge head for #${{ env.PR }}"
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.client_payload.pull_request.merge_commit_sha }}
           sparse-checkout: |
diff --git a/.github/workflows/slash-command-merge.yml b/.github/workflows/slash-command-merge.yml
index a6bd444217c..5ec6db60d3d 100644
--- a/.github/workflows/slash-command-merge.yml
+++ b/.github/workflows/slash-command-merge.yml
@@ -15,7 +15,7 @@ jobs:
     name: Trim description and merge
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           sparse-checkout: |
             tools/ci_format_pr_description.js