diff --git a/lockfree.opam b/lockfree.opam
index 606c8818..37201e17 100644
--- a/lockfree.opam
+++ b/lockfree.opam
@@ -18,6 +18,8 @@ depends: [
   "alcotest" {>= "1.6.0"}
   "yojson" {>= "2.0.2"}
   "dscheck" {with-test & >= "0.0.1"}
+  "ppx_deriving" {with-test & >= "5.2.1"}
+  "ppx_deriving_qcheck" {with-test & >= "0.2.0"}
 ]
 depopts: []
 build: ["dune" "build" "-p" name "-j" jobs]