diff --git a/.github/workflows/dependency-check.yml b/.github/workflows/dependency-check.yml
index cc2db240..fef7cc33 100644
--- a/.github/workflows/dependency-check.yml
+++ b/.github/workflows/dependency-check.yml
@@ -21,7 +21,7 @@ jobs:
 
       # speeds up repeat runs (~30 s instead of several minutes)
       - name: Restore NVD DB cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.dependency-check
           key: depcheck-${{ runner.os }}-${{ hashFiles('**/requirements*.txt',
diff --git a/.github/workflows/docs-build.yml b/.github/workflows/docs-build.yml
index dfdb8523..ff52d0d2 100644
--- a/.github/workflows/docs-build.yml
+++ b/.github/workflows/docs-build.yml
@@ -14,7 +14,7 @@ jobs:
         with:
           python-version: "3.x"
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index aef3b5fb..323ce944 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -15,7 +15,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 4523c497..b3e8aad6 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -36,7 +36,7 @@ jobs:
       - name: Install pip 24.3.1 to avoid GHSA-4xh5-x5gv-qwph
         run: python -m pip install --upgrade "pip==24.3.1"
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
@@ -52,7 +52,7 @@ jobs:
         with:
           node-version: "20"
       - name: Cache npm
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.npm
           key: ${{ runner.os }}-npm-${{ hashFiles('**/package.json') }}
@@ -62,7 +62,7 @@ jobs:
         run: npm install
         # Jest and Prettier are devDependencies installed here
       - name: Cache pre-commit
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pre-commit
           key: ${{ runner.os }}-pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
diff --git a/.github/workflows/release-packages.yml b/.github/workflows/release-packages.yml
index 62228936..75ce0af8 100644
--- a/.github/workflows/release-packages.yml
+++ b/.github/workflows/release-packages.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
@@ -77,7 +77,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
@@ -113,7 +113,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Cache uv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}