diff --git a/.github/workflows/build-chocolatey.yml b/.github/workflows/build-chocolatey.yml
index 9de87d8e5ad6..b52f5593f4e7 100644
--- a/.github/workflows/build-chocolatey.yml
+++ b/.github/workflows/build-chocolatey.yml
@@ -27,7 +27,7 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Replace the version placeholder
         uses: richardrigutins/replace-in-files@v2
         with:
diff --git a/.github/workflows/build-sdk.yml b/.github/workflows/build-sdk.yml
index 63b31b742d8b..b3f3518efea0 100644
--- a/.github/workflows/build-sdk.yml
+++ b/.github/workflows/build-sdk.yml
@@ -34,7 +34,7 @@ jobs:
       universal-digest : ${{ steps.universal-digest.outputs.digest }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-java@v4
         with:
           distribution: temurin
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fdd3fa99f764..f58676c79a40 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -84,13 +84,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -137,13 +137,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -180,7 +180,7 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Test
         run: sbt ";scala3-bootstrapped/compile; scala3-bootstrapped/testCompilation; scala3-presentation-compiler/test; scala3-language-server/test"
@@ -224,7 +224,7 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Test
         run: sbt ";dist/pack ;scala3-bootstrapped/compile ;scala3-bootstrapped/test"
@@ -266,13 +266,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -313,13 +313,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -367,13 +367,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -421,13 +421,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -474,13 +474,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -523,13 +523,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -571,13 +571,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -635,13 +635,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -690,13 +690,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true
@@ -759,7 +759,7 @@ jobs:
     if: "failure() && github.event_name == 'schedule'"
     steps:
       - name: Checkout issue template
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Open an issue
         uses: JasonEtco/create-an-issue@v2
diff --git a/.github/workflows/dependency-graph.yml b/.github/workflows/dependency-graph.yml
index 7b4d7237a500..154bd9f8afbe 100644
--- a/.github/workflows/dependency-graph.yml
+++ b/.github/workflows/dependency-graph.yml
@@ -8,6 +8,6 @@ jobs:
     name: Update Dependency Graph
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: sbt/setup-sbt@v1
       - uses: scalacenter/sbt-dependency-submission@v3
diff --git a/.github/workflows/language-reference.yaml b/.github/workflows/language-reference.yaml
index 6406996b7ec5..a4c19a0d7c13 100644
--- a/.github/workflows/language-reference.yaml
+++ b/.github/workflows/language-reference.yaml
@@ -24,7 +24,7 @@ jobs:
         run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
 
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: 'dotty'
           fetch-depth: 0
@@ -47,7 +47,7 @@ jobs:
 
       - name: Push changes to scala3-reference-docs
         if: github.event_name == 'push'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: lampepfl/scala3-reference-docs
           fetch-depth: 0
diff --git a/.github/workflows/scaladoc.yaml b/.github/workflows/scaladoc.yaml
index 22c49d2ff9c1..87b450edcb2b 100644
--- a/.github/workflows/scaladoc.yaml
+++ b/.github/workflows/scaladoc.yaml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4
@@ -76,7 +76,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4