diff --git a/go.mod b/go.mod
index 9036b46..18cc467 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module git.crumpington.com/public/kvmemcache
 
 go 1.21.1
+
+require git.crumpington.com/public/keyedmutex v1.0.0