diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33f0d9b..9888176 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
           toolchain: ${{ matrix.rust }}
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -97,7 +97,7 @@ jobs:
           components: clippy
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -121,7 +121,7 @@ jobs:
           toolchain: nightly-2026-04-16
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 727252d..ee15cd1 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -37,7 +37,7 @@ jobs:
         run: cargo install cargo-tarpaulin
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3f1f833..4226caa 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -30,7 +30,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -70,7 +70,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 141ef8e..5e92053 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -48,7 +48,7 @@ jobs:
       - uses: actions/checkout@master
       - name: Install Rust
         run: rustup update stable && rustup default stable
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: ${{ runner.tool_cache }}/cargo-vet
           key: cargo-vet-bin-${{ env.CARGO_VET_VERSION }}