diff --git a/src/ligo.opam b/src/ligo.opam
index deef07ad5..d83d0aa15 100644
--- a/src/ligo.opam
+++ b/src/ligo.opam
@@ -18,6 +18,8 @@ depends: [
   "yojson"
   "alcotest" { with-test }
   "getopt"
+  # work around upstream in-place update
+  "ocaml-migrate-parsetree" { = "1.3.1" }
 ]
 build: [
   [ "dune" "build" "-p" name "-j" jobs ]