diff --git a/vif.opam b/vif.opam
index 3056cd4..85f3249 100644
--- a/vif.opam
+++ b/vif.opam
@@ -15,6 +15,7 @@ depends: [
   "fpath"
   "cmdliner"
   "httpcats"
+  "tyre"
 ]
 conflicts: [ "result" {< "1.5"} ]
 build: [