diff --git a/dune-project b/dune-project
index abe8bb8..64ead79 100644
--- a/dune-project
+++ b/dune-project
@@ -3,4 +3,5 @@
 (generate_opam_files true)
 
 (package
- (name ollisp))
+ (name ollisp)
+ (depends menhir))
diff --git a/ollisp.opam b/ollisp.opam
index 7d57766..6465843 100644
--- a/ollisp.opam
+++ b/ollisp.opam
@@ -2,6 +2,7 @@
 opam-version: "2.0"
 depends: [
   "dune" {>= "3.7"}
+  "menhir"
   "odoc" {with-doc}
 ]
 build: [