diff --git a/go.mod b/go.mod
index d6ff12d..cbced9d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/neilotoole/fifomu
 
-go 1.21
+go 1.20
 
 require golang.org/x/sync v0.6.0