diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51943e3..be20df7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           clean: true
@@ -80,7 +80,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           clean: true
@@ -119,7 +119,7 @@ jobs:
         working-directory: addon/skyfield
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           clean: true
@@ -164,7 +164,7 @@ jobs:
         working-directory: addon/skyfield
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           clean: true