diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 99cb777..4bb5b1e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,7 +85,7 @@ jobs:
           cache: "pip"
       - name: Restore/Save HuggingFace cache
         id: hf-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/huggingface
           key: hf-${{ runner.os }}-sentence-transformers-all-MiniLM-L6-v2-v1
@@ -113,7 +113,7 @@ jobs:
       # on every matrix leg, so the tests run offline and make no Hub request.
       - name: Restore HuggingFace models
         id: hf-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/huggingface
           key: hf-${{ runner.os }}-sentence-transformers-all-MiniLM-L6-v2-v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6f82485..f3e0362 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -115,7 +115,7 @@ jobs:
       # blocked by transient HF 429 rate limiting.
       - name: Cache HuggingFace models
         id: hf-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/huggingface
           key: hf-${{ runner.os }}-sentence-transformers-all-MiniLM-L6-v2-v1
diff --git a/.github/workflows/smoke-gate.yml b/.github/workflows/smoke-gate.yml
index 82df8d3..128adb9 100644
--- a/.github/workflows/smoke-gate.yml
+++ b/.github/workflows/smoke-gate.yml
@@ -32,7 +32,7 @@ jobs:
       # cache hit so no Hub request is made.
       - name: Cache HuggingFace models
         id: hf-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/huggingface
           key: hf-${{ runner.os }}-sentence-transformers-all-MiniLM-L6-v2-v1