diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d386484..56cc413 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
       # If that exact preview ever 404s (preview rotations sometimes get pulled),
       # swap to the manual dotnet-install fallback at the bottom of this file.
       - name: Setup .NET (from global.json)
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 
@@ -76,7 +76,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup .NET (from global.json)
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 4f9b07b..ea98fb5 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -23,7 +23,7 @@ jobs:
 
       # Use the same SDK pin as CI. .NET 11 preview SDK is required for C# 15 union.
       - name: Setup .NET (from global.json)
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json