diff --git a/dune-project b/dune-project
index f4113b3..7ef9017 100644
--- a/dune-project
+++ b/dune-project
@@ -28,7 +28,7 @@
  (synopsis "ppx-based instrumentation for trace")
  (depends
    (ocaml (>= 4.12)) ; we use __FUNCTION__
-   ppxlib
+   (ppxlib (>= 0.28))
    (trace (= :version))
    (trace-tef (and (= :version) :with-test))
    dune)
diff --git a/ppx_trace.opam b/ppx_trace.opam
index b00d78c..818df8b 100644
--- a/ppx_trace.opam
+++ b/ppx_trace.opam
@@ -10,7 +10,7 @@ homepage: "https://github.com/c-cube/ocaml-trace"
 bug-reports: "https://github.com/c-cube/ocaml-trace/issues"
 depends: [
   "ocaml" {>= "4.12"}
-  "ppxlib"
+  "ppxlib" {>= "0.28"}
   "trace" {= version}
   "trace-tef" {= version & with-test}
   "dune" {>= "2.9"}