diff --git a/opam b/opam
index 54ef8f9..8a72412 100644
--- a/opam
+++ b/opam
@@ -19,7 +19,7 @@ build: [
   [make]
 ]
 depends: [
-  "ocp-build" {>= "1.99.6-beta"}
+  "ocp-build" {>= "1.99.13-beta"}
   "ocp-indent" {>= "1.4.2"}
   "re"
   "cmdliner"