diff --git a/.github/workflows/ci_docs.yml b/.github/workflows/ci_docs.yml
index fe137263..98ccc5ce 100644
--- a/.github/workflows/ci_docs.yml
+++ b/.github/workflows/ci_docs.yml
@@ -25,7 +25,7 @@ jobs:
 
       # Cache lychee for faster link checking
       - name: Cache lychee
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/lychee
           key: lychee-${{ runner.os }}-${{ hashFiles('**/*.md') }}
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 4b1c3194..08defaa9 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Cache system dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: sys-cache
         with:
           path: /usr/local/bin/actionlint
diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
index efc98dfb..97c90955 100644
--- a/.github/workflows/smoke.yml
+++ b/.github/workflows/smoke.yml
@@ -42,7 +42,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Cache validation tools
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: tools-cache
         with:
           path: |