diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d348c78..907b539 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
@@ -45,7 +45,7 @@ jobs:
         runs-on: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
           submodules: recursive
@@ -64,7 +64,7 @@ jobs:
           node-version: 18
 
       - name: Checkout PS
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: smogon/pokemon-showdown
           path: pokemon-showdown
@@ -126,7 +126,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0