diff --git a/packages/ocaml-lsp-server/ocaml-lsp-server.1.18.0~5.2preview/opam b/packages/ocaml-lsp-server/ocaml-lsp-server.1.18.0~5.2preview/opam
index 31ea16e2eec..4859e59e3f1 100644
--- a/packages/ocaml-lsp-server/ocaml-lsp-server.1.18.0~5.2preview/opam
+++ b/packages/ocaml-lsp-server/ocaml-lsp-server.1.18.0~5.2preview/opam
@@ -43,7 +43,8 @@ depends: [
   "ocamlformat-rpc-lib" {>= "0.21.0"}
   "odoc" {with-doc}
   "ocaml" {>= "5.2" & < "5.3"}
-  "merlin-lib" {>= "5.0"}
+  "merlin-lib" {>= "5.1"}
+  "ocaml-index" {>= "1.0" & post}
 ]
 flags: avoid-version
 available: opam-version >= "2.1.0"
@@ -61,9 +62,9 @@ build: [
 ]
 url {
   src:
-    "https://github.com/ocaml/ocaml-lsp/archive/3d84dc42c468d03ce36291985573b87767b6f670.tar.gz"
+    "https://github.com/ocaml/ocaml-lsp/archive/0573158a2bdbe891d6d0026c922d9cfdca55bcf8.tar.gz"
   checksum: [
-    "sha256=f6a54286923b9ec019748a258b40e0b889d155427c262a3ab69ddb02c48409a8"
-    "sha512=1efd7fbdd381b17df7be998200ad6b44c48a8b886e2ffc0a16a618a0f2019d5e0350446c10359a4d32072e943ecad9a6c706b437478bd5773a0b479925ff5596"
+    "sha256=dbf43e82a01b2999db6b5df009b3f285b04265b81ec34edc25604b72e1613a2c"
+    "sha512=51bbf98dd4cd2c9d35cc3a515fff74a7d10ed736febb8ff2683739aab818e578ca16e9f126aa774a492a7141e0d34977fc1558f5feac71b8db3c1e1843fd213f"
   ]
 }