diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aa38d65979..694aaf1670 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Cache pip
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/requirements.txt') }}
@@ -31,7 +31,7 @@ jobs:
             ${{ runner.os }}-pip-${{ matrix.python-version }}-
           
       - name: Cache virtualenv
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .venv
           key: ${{ runner.os }}-venv-${{ matrix.python-version }}-${{ github.run_id }}
diff --git a/.github/workflows/prompt_smoke_ci.yml b/.github/workflows/prompt_smoke_ci.yml
index 4259cfbcdb..23b0697f35 100644
--- a/.github/workflows/prompt_smoke_ci.yml
+++ b/.github/workflows/prompt_smoke_ci.yml
@@ -34,7 +34,7 @@ jobs:
         with:
           python-version: '3.11'
       - name: Cache pip
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('ci-requirements.txt') }}
@@ -65,7 +65,7 @@ jobs:
         with:
           python-version: '3.11'
       - name: Cache pip
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-full-${{ hashFiles('ci-requirements.txt') }}
diff --git a/.github/workflows/release-artifacts.yml b/.github/workflows/release-artifacts.yml
index 1a7e921b42..a4a86b8216 100644
--- a/.github/workflows/release-artifacts.yml
+++ b/.github/workflows/release-artifacts.yml
@@ -66,7 +66,7 @@ jobs:
           install: true
 
       - name: Set up docker layer caching
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d8e195956d..12f129db50 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -165,7 +165,7 @@ jobs:
       # Cribbed from
       # https://github.com/AustinScola/mypy-cache-github-action/blob/85ea4f2972abed39b33bd02c36e341b28ca59213/src/restore.ts#L10-L17
       - name: Restore/persist mypy's cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             .mypy_cache