diff --git a/.github/workflows/win.yml b/.github/workflows/win.yml
index 3a85c057d..d08d5824d 100644
--- a/.github/workflows/win.yml
+++ b/.github/workflows/win.yml
@@ -94,6 +94,14 @@ jobs:
           nuget sources Disable -Name "Microsoft Visual Studio Offline Packages"
           nuget sources Add -Source https://api.nuget.org/v3/index.json & exit 0
 
+      - name: ThirdParty cache.
+        id: cache-third-party
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.TBUILD }}\ThirdParty
+          key: ${{ runner.OS }}-${{ matrix.arch }}-third-party-${{ env.CACHE_KEY }}
+          restore-keys: ${{ runner.OS }}-${{ matrix.arch }}-third-party-
+
       - name: Libraries cache.
         id: cache-libs
         uses: actions/cache@v4