diff --git a/fixtures/go.mod b/fixtures/go.mod
index a0c586b..0b1dfd9 100644
--- a/fixtures/go.mod
+++ b/fixtures/go.mod
@@ -1,3 +1,3 @@
 module github.com/int128/docker-build-workflow/fixtures
 
-go 1.21.5
+go 1.21.6