diff --git a/packages/GT/GT.0.5.3/opam b/packages/GT/GT.0.5.3/opam
index f043b62999e1..86e4efe9321c 100644
--- a/packages/GT/GT.0.5.3/opam
+++ b/packages/GT/GT.0.5.3/opam
@@ -20,7 +20,7 @@ license: "LGPL-2.1-or-later"
 homepage: "https://github.com/PLTools/GT"
 bug-reports: "https://github.com/PLTools/GT/issues"
 depends: [
-  "ppxlib" {<= "0.32.1"}
+  "ppxlib" {<= "0.33.0"}
   "ocaml" {>= "4.14" & < "5.0.0" | >= "5.2.0" & < "5.3.0"}
   "camlp5" {>= "8.00.05"}
   "dune" {>= "2.8"}