diff --git a/packages/graphql-cohttp/graphql-cohttp.0.10.0/opam b/packages/graphql-cohttp/graphql-cohttp.0.10.0/opam
index eda91248736..e599b04b533 100644
--- a/packages/graphql-cohttp/graphql-cohttp.0.10.0/opam
+++ b/packages/graphql-cohttp/graphql-cohttp.0.10.0/opam
@@ -12,10 +12,10 @@ build: [
 ]
 
 depends: [
-  "ocaml" {>= "4.03.0"}
+  "ocaml" {>= "4.06.0"}
   "dune"
   "graphql" {>= "0.9.0"}
-  "cohttp" {>= "2.0.0"}
+  "cohttp" {>= "2.0.0" & < "6.0.0~~"}
   "crunch"
   "astring" {>= "0.8.3"}
   "base64" {>= "3.0.0"}
@@ -35,4 +35,4 @@ url {
     "sha256=7f52ecaa111449a384a89588cb58a7c42372c4e746caa201d297201b9fd71bee"
     "md5=5e042ca937360aec9d756f1b0ef52803"
   ]
-}
\ No newline at end of file
+}
diff --git a/packages/graphql-cohttp/graphql-cohttp.0.12.0/opam b/packages/graphql-cohttp/graphql-cohttp.0.12.0/opam
index 051364bd6cb..743bdab5316 100644
--- a/packages/graphql-cohttp/graphql-cohttp.0.12.0/opam
+++ b/packages/graphql-cohttp/graphql-cohttp.0.12.0/opam
@@ -12,10 +12,10 @@ build: [
 ]
 
 depends: [
-  "ocaml" {>= "4.03.0"}
+  "ocaml" {>= "4.06.0"}
   "dune"
   "graphql" {>= "0.9.0"}
-  "cohttp" {>= "2.0.0"}
+  "cohttp" {>= "2.0.0" & < "6.0.0~~"}
   "crunch"
   "astring" {>= "0.8.3"}
   "base64" {>= "3.0.0"}
diff --git a/packages/graphql-cohttp/graphql-cohttp.0.12.1/opam b/packages/graphql-cohttp/graphql-cohttp.0.12.1/opam
index 767e3c0efd9..720bc0698af 100644
--- a/packages/graphql-cohttp/graphql-cohttp.0.12.1/opam
+++ b/packages/graphql-cohttp/graphql-cohttp.0.12.1/opam
@@ -12,10 +12,10 @@ build: [
 ]
 
 depends: [
-  "ocaml" {>= "4.03.0"}
+  "ocaml" {>= "4.06.0"}
   "dune"
   "graphql" {>= "0.9.0"}
-  "cohttp" {>= "2.0.0"}
+  "cohttp" {>= "2.0.0" & < "6.0.0~~"}
   "crunch"
   "astring" {>= "0.8.3"}
   "base64" {>= "3.0.0"}
diff --git a/packages/graphql-cohttp/graphql-cohttp.0.13.0/opam b/packages/graphql-cohttp/graphql-cohttp.0.13.0/opam
index f2f7d43ead8..e10a70c6097 100644
--- a/packages/graphql-cohttp/graphql-cohttp.0.13.0/opam
+++ b/packages/graphql-cohttp/graphql-cohttp.0.13.0/opam
@@ -13,10 +13,10 @@ build: [
 ]
 
 depends: [
-  "ocaml" {>= "4.03.0"}
+  "ocaml" {>= "4.06.0"}
   "dune" {>= "1.1"}
   "graphql" {>= "0.13.0"}
-  "cohttp" {>= "2.0.0"}
+  "cohttp" {>= "2.0.0" & < "6.0.0~~"}
   "crunch"
   "astring" {>= "0.8.3"}
   "base64" {>= "3.0.0"}
diff --git a/packages/graphql-cohttp/graphql-cohttp.0.14.0/opam b/packages/graphql-cohttp/graphql-cohttp.0.14.0/opam
index 6b5790ff6c2..8a122038b6e 100644
--- a/packages/graphql-cohttp/graphql-cohttp.0.14.0/opam
+++ b/packages/graphql-cohttp/graphql-cohttp.0.14.0/opam
@@ -16,7 +16,7 @@ depends: [
   "ocaml" {>= "4.08.0"}
   "dune" {>= "1.11"}
   "graphql" {>= "0.13.0"}
-  "cohttp" {>= "2.0.0"}
+  "cohttp" {>= "2.0.0" & < "6.0.0~~"}
   "crunch" {>= "2.0.0"}
   "astring" {>= "0.8.3"}
   "base64" {>= "3.0.0"}