diff --git a/vif.opam b/vif.opam
index 85f3249..ab8498d 100644
--- a/vif.opam
+++ b/vif.opam
@@ -16,6 +16,7 @@ depends: [
   "cmdliner"
   "httpcats"
   "tyre"
+  "mirage-crypto-rng-miou-unix"
 ]
 conflicts: [ "result" {< "1.5"} ]
 build: [