diff --git a/.github/workflows/set_for_end_of_british_summertime.yml b/.github/workflows/set_for_end_of_british_summertime.yml
index 361c5d5..69603e4 100644
--- a/.github/workflows/set_for_end_of_british_summertime.yml
+++ b/.github/workflows/set_for_end_of_british_summertime.yml
@@ -8,8 +8,7 @@ jobs:
         runs-on: ubuntu-latest
         name: Turn off BST time adjustment
         steps:
-            # actions/checkout@v7.0.0
-            - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
+            - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
             - name: Update to reflect end of British Summer time
               run: |
                   sed -i 's/T08:30Z/T09:30Z/g' pages/index.html
diff --git a/.github/workflows/set_for_start_of_british_summertime.yml b/.github/workflows/set_for_start_of_british_summertime.yml
index 4471cd8..f72db0b 100644
--- a/.github/workflows/set_for_start_of_british_summertime.yml
+++ b/.github/workflows/set_for_start_of_british_summertime.yml
@@ -8,8 +8,7 @@ jobs:
         runs-on: ubuntu-latest
         name: Turn on BST adjustment
         steps:
-            # actions/checkout@v7.0.0
-            - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
+            - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
             - name: Update to reflect start of British Summer time
               run: |
                   sed -i 's/T09:30Z/T08:30Z/g' pages/index.html
diff --git a/.github/workflows/update-date.yaml b/.github/workflows/update-date.yaml
index bfb3c04..c1557cf 100644
--- a/.github/workflows/update-date.yaml
+++ b/.github/workflows/update-date.yaml
@@ -8,7 +8,7 @@ jobs:
     name: Add next file
     steps:
       # actions/checkout@v7.0.0
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
       - name: Create file and push
         run: |
           sudo apt update && sudo apt install -y ncal