diff --git a/dune-project b/dune-project
index 5d0abb7c..057276d1 100644
--- a/dune-project
+++ b/dune-project
@@ -13,6 +13,7 @@
   (synopsis "Pure OCaml compiler for .proto files")
   (depends
     (odoc :with-doc)
+    (pbrt (= :version))
     (ocaml (>= 4.03)))
   (tags (protoc protobuf codegen)))
 
diff --git a/ocaml-protoc.opam b/ocaml-protoc.opam
index 3e11f264..24c8e06c 100644
--- a/ocaml-protoc.opam
+++ b/ocaml-protoc.opam
@@ -11,6 +11,7 @@ bug-reports: "https://github.com/mransan/ocaml-protoc/issues"
 depends: [
   "dune" {>= "2.0"}
   "odoc" {with-doc}
+  "pbrt" {= version}
   "ocaml" {>= "4.03"}
 ]
 build: [