diff --git a/version.go b/version.go
index 9763f04..d160c0e 100644
--- a/version.go
+++ b/version.go
@@ -5,4 +5,4 @@
 package pathtoregexp
 
 // Version is the current path-to-regexp's version.
-const Version = "v1.6.4-dev"
+const Version = "v1.6.4"