diff --git a/src/lib_stdlib/tezos-stdlib.opam b/src/lib_stdlib/tezos-stdlib.opam
index 75ff3f6ce..7dc33f564 100644
--- a/src/lib_stdlib/tezos-stdlib.opam
+++ b/src/lib_stdlib/tezos-stdlib.opam
@@ -15,7 +15,7 @@ depends: [
   "lwt"
   "zarith"
   "alcotest" { with-test }
-  "ocp-indent" { with-test }
+  "ocp-indent" { with-test & = "1.6.1" }
 ]
 build: [
   [ "dune" "build" "-p" name "-j" jobs ]