diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index de8dc8b..2cee60e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,9 +5,9 @@ jobs:
     name: Build
     strategy:
       matrix:
-        go: [1.13, 1.14]
+        go: [1.20, 1.21]
     runs-on: ubuntu-latest
-    container: golang:${{ matrix.go }}-stretch
+    container: golang:${{ matrix.go }}-bookworm
     steps:
     - run: go get golang.org/x/tools/cmd/goimports
     - run: go get golang.org/x/lint/golint