diff --git a/go.mod b/go.mod
index ca7cc11..58143c0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/mdlayher/socket
 
-go 1.21
+go 1.20
 
 require (
 	github.com/google/go-cmp v0.5.9