diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9c9f013..194809c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
           - 1.77.0
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@master
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@nightly
@@ -140,7 +140,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -156,10 +156,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@nightly
 
       - name: Run cargo doc
         run: cargo doc --no-deps --all-features --document-private-items
diff --git a/.github/workflows/loom.yml b/.github/workflows/loom.yml
index 23a7106..a86b5a9 100644
--- a/.github/workflows/loom.yml
+++ b/.github/workflows/loom.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@stable