diff --git a/monitoring-experiments.opam b/monitoring-experiments.opam
index af52d22..093804a 100644
--- a/monitoring-experiments.opam
+++ b/monitoring-experiments.opam
@@ -17,7 +17,7 @@ depends: [
   "mirage-clock" {>= "3.0.0"}
   "mirage-time" {>= "2.0.0"}
   "mirage-stack" {>= "2.2.0"}
-  "tcpip" {>= "6.0.99"}
+  "tcpip" {>= "6.1.99"}
   "mirage-net-solo5" {>= "0.6.2"}
   "mirage-solo5" {>= "0.6.4"}
   "ocaml-freestanding" {>= "0.4.5"}