diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 233151d..010cc5f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,7 +41,7 @@ jobs:
           poetry config virtualenvs.in-project true --local
 
       - name: Cache Poetry virtualenv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .venv
           key: venv-${{ runner.os }}-py${{ matrix.python }}-${{ hashFiles('poetry.lock') }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8a1a2e5..157d402 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,7 @@ jobs:
           poetry config virtualenvs.in-project true --local
 
       - name: Cache Poetry virtualenv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .venv
           key: venv-ci-${{ runner.os }}-py${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
@@ -76,7 +76,7 @@ jobs:
           poetry config virtualenvs.in-project true --local
 
       - name: Cache Poetry virtualenv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .venv
           key: venv-heavy-${{ runner.os }}-py3.12-${{ hashFiles('poetry.lock') }}
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 951f80e..0fb603f 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -29,7 +29,7 @@ jobs:
           poetry config virtualenvs.in-project true --local
 
       - name: Cache Poetry virtualenv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .venv
           key: venv-docs-${{ runner.os }}-py3.11-${{ hashFiles('poetry.lock') }}