diff --git a/opam b/opam
index 70429cf534dd0260a688aeeead433df9b261d0be..a992b4e6ed3c7793f907352770c0a4bf946daa28 100644
--- a/opam
+++ b/opam
@@ -129,6 +129,7 @@ depends: [
   # PPXs
   "ppx_deriving"
   "ppx_deriving_yojson"
+  "ppx_deriving_yaml"
   "ppx_import"
 
   # GTK3 for non-macos only