diff --git a/.bazelversion b/.bazelversion
index e7fdef7e..44931da2 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-8.4.2
+9.1.1
diff --git a/.github/workflows/ci-cpp-build-gnoi.yml b/.github/workflows/ci-cpp-build-gnoi.yml
index 9bf176d1..12a4afe6 100644
--- a/.github/workflows/ci-cpp-build-gnoi.yml
+++ b/.github/workflows/ci-cpp-build-gnoi.yml
@@ -14,7 +14,7 @@ jobs:
     env:
       BAZEL: bazelisk-linux-amd64
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           submodules: recursive
       - name: Setup Bazel
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index b7a598bf..24a474bd 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0