diff --git a/packages/builder-web.0.2.0~dev/opam b/packages/builder-web.0.2.0~dev/opam
index c140ec0..6fd53b2 100644
--- a/packages/builder-web.0.2.0~dev/opam
+++ b/packages/builder-web.0.2.0~dev/opam
@@ -16,7 +16,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.7.0"}
+  "dune" {>= "2.7.0" & < "3.0.0"}
   "builder" {>= "0.2.0"}
   "dream" {= "1.0.0~alpha2"}
   "cstruct" {>= "6.0.0"}