diff --git a/packages/opam-compiler/opam-compiler.0.1.0/opam b/packages/opam-compiler/opam-compiler.0.1.0/opam
index c2528e157b67..d66f5268e2c6 100644
--- a/packages/opam-compiler/opam-compiler.0.1.0/opam
+++ b/packages/opam-compiler/opam-compiler.0.1.0/opam
@@ -15,6 +15,7 @@ depends: [
   "github-unix"
   "lwt_ssl"
   "re"
+  "lwt" {< "5.7.0"}
   "alcotest" {>= "1.2.0" & with-test}
 ]
 build: [
diff --git a/packages/opam-compiler/opam-compiler.0.1.1/opam b/packages/opam-compiler/opam-compiler.0.1.1/opam
index d9dbac8ef8b2..16b9db6ab6ab 100644
--- a/packages/opam-compiler/opam-compiler.0.1.1/opam
+++ b/packages/opam-compiler/opam-compiler.0.1.1/opam
@@ -15,6 +15,7 @@ depends: [
   "github-unix"
   "lwt_ssl"
   "re"
+  "lwt" {< "5.7.0"}
   "alcotest" {>= "1.2.0" & with-test}
 ]
 build: [