diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 25b3b99b..5473c18d 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -37,7 +37,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@nightly
 
       - name: Cache cargo registry + build artifacts
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/bin
diff --git a/.github/workflows/vdf-client-hw.yml b/.github/workflows/vdf-client-hw.yml
index d3ad6418..15e2ca96 100644
--- a/.github/workflows/vdf-client-hw.yml
+++ b/.github/workflows/vdf-client-hw.yml
@@ -120,7 +120,7 @@ jobs:
       - name: Cache Boost on Windows
         if: matrix.os == 'windows-latest'
         id: cache-boost
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           path: C:\local\boost_*
           key: windows-boost-msvc-14.3-v1
@@ -128,7 +128,7 @@ jobs:
       - name: Cache mpir checkout on Windows
         if: matrix.os == 'windows-latest'
         id: cache-mpir
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: mpir_gc_x64
           key: windows-mpir-gc-x64-v1
@@ -173,7 +173,7 @@ jobs:
 
       - name: Save Boost cache on Windows
         if: matrix.os == 'windows-latest' && steps.cache-boost.outputs.cache-hit != 'true'
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v5
         with:
           path: C:\local\boost_*
           key: ${{ steps.cache-boost.outputs.cache-primary-key }}