diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f16963..dd1de52 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,7 +63,7 @@ jobs:
       # (1m38s) did not beat the cold one (1m37s). Kept as insurance against a slow NuGet mirror, and
       # because it costs nothing. The pipeline's real win was flattening the job graph, not this.
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('Directory.Packages.props') }}
@@ -83,7 +83,7 @@ jobs:
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('Directory.Packages.props') }}
@@ -122,7 +122,7 @@ jobs:
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('Directory.Packages.props') }}
@@ -143,7 +143,7 @@ jobs:
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('Directory.Packages.props') }}