diff --git a/.github/workflows/golang.yml b/.github/workflows/golang.yml
index c39ec9a..07b19a7 100644
--- a/.github/workflows/golang.yml
+++ b/.github/workflows/golang.yml
@@ -1,23 +1,23 @@
 name: golang
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 jobs:
   build:
     strategy:
       matrix:
-        go-version: ['1.19']
+        go-version: [1.21]
         os: [ubuntu-latest, macos-latest, windows-latest]
     env:
       CGO_ENABLED: 0
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/setup-go@v3
-      with:
-        go-version: ${{ matrix.go-version }}
-        check-latest: true
-    - uses: actions/checkout@v3
-    - run: go build ./...
-    - run: go vet ./...
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go-version }}
+          check-latest: true
+      - uses: actions/checkout@v3
+      - run: go build ./...
+      - run: go vet ./...
diff --git a/go.mod b/go.mod
index 5eaa192..dbecfbd 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module paepcke.de/hq
 
-go 1.22.3
+go 1.21
 
 require (
 	github.com/klauspost/compress v1.17.8