diff --git a/.github/workflows/deploy-preview.yml b/.github/workflows/deploy-preview.yml
index c0b1755a8..b8273a7c5 100644
--- a/.github/workflows/deploy-preview.yml
+++ b/.github/workflows/deploy-preview.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout book
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         if: github.event.action != 'closed'
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 7bcbe4d79..260de620e 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout book
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
diff --git a/requirements.txt b/requirements.txt
index 9fc0428eb..59f37910c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-jupyter-book
+jupyter-book<2