diff --git a/packages/monitoring-experiments.0.0.3~dev/opam b/packages/monitoring-experiments.0.0.3~dev/opam
index 2401dee..0bfb40a 100644
--- a/packages/monitoring-experiments.0.0.3~dev/opam
+++ b/packages/monitoring-experiments.0.0.3~dev/opam
@@ -9,7 +9,7 @@ license: "AGPL"
 
 depends: [
   "ocaml" {>= "4.08.0"}
-  "dune"
+  "dune" {< "3.0"}
   "logs" {>= "0.6.3"}
   "metrics" {>= "0.4.0"}
   "metrics-lwt" {>= "0.2.0"}