diff --git a/esy.json b/esy.json
index 49bfd11ee..eb376cfae 100644
--- a/esy.json
+++ b/esy.json
@@ -2,7 +2,7 @@
   "name": "reason-cli",
   "notes": "This is just the dev package config (also built as globally installable reason-cli). See ./refmt.json ./rtop.json for individual release package configs.",
   "license": "MIT",
-  "version": "3.6.0",
+  "version": "3.6.1",
   "dependencies": {
     "ocaml": " >= 4.2.0 < 4.11.0",
     "@opam/fix": "*",
@@ -11,7 +11,7 @@
     "@opam/utop": " >= 1.17.0 < 2.5.0",
     "@opam/merlin-extend": " >= 0.6",
     "@opam/result": "*",
-    "@opam/ocaml-migrate-parsetree": "*",
+    "@opam/ocaml-migrate-parsetree": " < 2.0.0",
     "@opam/dune": "< 2.0.0"
   },
   "devDependencies": {
diff --git a/package.json b/package.json
index f20eb58c9..4a031fc48 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "reason",
-	"version": "3.6.0",
+	"version": "3.6.1",
 	"description": "Simple, fast & type safe code that leverages the JavaScript & OCaml ecosystems",
 	"repository": {
 		"type": "git",
diff --git a/reason.json b/reason.json
index a4b484238..61125315b 100644
--- a/reason.json
+++ b/reason.json
@@ -1,6 +1,6 @@
 {
   "name": "@esy-ocaml/reason",
-  "version": "3.6.0",
+  "version": "3.6.1",
   "license": "MIT",
   "description": "Native Compiler Support for Reason: Simple, fast & type safe code that leverages the JavaScript & OCaml ecosystems",
   "repository": {
@@ -14,7 +14,7 @@
     "@opam/menhir": " >= 20170418.0.0",
     "@opam/merlin-extend": " >= 0.3",
     "@opam/result": "*",
-    "@opam/ocaml-migrate-parsetree": "*",
+    "@opam/ocaml-migrate-parsetree": " < 2.0.0",
     "@opam/dune": "*"
   },
   "devDependencies": {
diff --git a/reason.opam b/reason.opam
index 465800c6b..4e45f6d46 100644
--- a/reason.opam
+++ b/reason.opam
@@ -19,7 +19,7 @@ depends: [
   "merlin-extend" {>= "0.6"}
   "fix"
   "result"
-  "ocaml-migrate-parsetree"
+  "ocaml-migrate-parsetree" {< "2.0.0"}
 ]
 synopsis: "Reason: Syntax & Toolchain for OCaml"
 description: """
diff --git a/src/refmt/package.ml b/src/refmt/package.ml
index f01d48cd9..84653cf65 100644
--- a/src/refmt/package.ml
+++ b/src/refmt/package.ml
@@ -1,4 +1,4 @@
 
-let version = "3.6.0"
+let version = "3.6.1"
 let git_version = "59339f6fde0ea2cd4822d32bb99a7ec5b6865e3a"
 let git_short_version = "59339f6"