diff --git a/opam b/opam
index f44d5bb..6d8f739 100644
--- a/opam
+++ b/opam
@@ -11,7 +11,7 @@ depends: [
   "ocamlbuild" {build}
   "topkg" {build}
   "lwt" {>= "3.0.0"}
-  "ipaddr" {>= "2.2.0"}
+  "ipaddr" {>= "2.9.0"}
   "hex"
   "cstruct"
   "logs"