diff --git a/.github/workflows/CDA-testing.yml b/.github/workflows/CDA-testing.yml
index ed6a101..c66bbe4 100644
--- a/.github/workflows/CDA-testing.yml
+++ b/.github/workflows/CDA-testing.yml
@@ -41,7 +41,7 @@ jobs:
 
           # Poetry will handle installation and caching
       - name: Cache Python dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: cache-poetry-venv
         with:
           path: .venv
diff --git a/.github/workflows/pypi-deploy.yml b/.github/workflows/pypi-deploy.yml
index cb8194e..7e71bcc 100644
--- a/.github/workflows/pypi-deploy.yml
+++ b/.github/workflows/pypi-deploy.yml
@@ -23,7 +23,7 @@ jobs:
         uses: abatilo/actions-poetry@v4
 
       - name: Cache Virtual Environment
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ./.venv
           key: venv-${{ hashFiles('poetry.lock') }}
diff --git a/.github/workflows/test-deploy.yml b/.github/workflows/test-deploy.yml
index c4e7051..599dc88 100644
--- a/.github/workflows/test-deploy.yml
+++ b/.github/workflows/test-deploy.yml
@@ -30,7 +30,7 @@ jobs:
         uses: abatilo/actions-poetry@v4
 
       - name: Cache Virtual Environment
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ./.venv
           key: venv-${{ hashFiles('poetry.lock') }}
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index abb509f..e51f912 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -22,7 +22,7 @@ jobs:
         uses: abatilo/actions-poetry@v4
 
       - name: Cache Virtual Environment
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ./.venv
           key: venv-${{ hashFiles('poetry.lock') }}