diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d386484..bf396a4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
 
       # NuGet package cache. Keyed on the lockfile-equivalent (csproj refs + global.json).
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('**/*.csproj', 'global.json') }}
@@ -81,7 +81,7 @@ jobs:
           global-json-file: global.json
 
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.nuget/packages
           key: nuget-${{ runner.os }}-${{ hashFiles('**/*.csproj', 'global.json') }}