diff --git a/vendors/ocaml-hacl/hacl.opam b/vendors/ocaml-hacl/hacl.opam
index 6018e2c5c..422a68364 100644
--- a/vendors/ocaml-hacl/hacl.opam
+++ b/vendors/ocaml-hacl/hacl.opam
@@ -14,6 +14,8 @@ depends: [
   "zarith" {>= "1.7"}
   "alcotest" {test & >= "0.8.1"}
   "hex" {test & >= "1.2.0"}
+  "base"
+  "stdio"
 ]
 build: [ "jbuilder" "build" "-j" jobs "-p" name "@install" ]
 build-test: [ "jbuilder" "runtest" "-p" name "-j" jobs ]