diff --git a/packages/picos_io_cohttp/picos_io_cohttp.0.5.0/opam b/packages/picos_io_cohttp/picos_io_cohttp.0.5.0/opam
index 957a2c1aac2..73e4b0eb746 100644
--- a/packages/picos_io_cohttp/picos_io_cohttp.0.5.0/opam
+++ b/packages/picos_io_cohttp/picos_io_cohttp.0.5.0/opam
@@ -8,7 +8,7 @@ bug-reports: "https://github.com/ocaml-multicore/picos/issues"
 depends: [
   "dune" {>= "3.14"}
   "picos_io" {= version}
-  "cohttp" {>= "6.0.0~beta2"}
+  "cohttp" {>= "6.0.0~beta2" & <"6.0.0"} 
   "fmt" {>= "0.9.0"}
   "uri" {>= "4.4.0"}
   "odoc" {with-doc}
diff --git a/packages/picos_io_cohttp/picos_io_cohttp.0.6.0/opam b/packages/picos_io_cohttp/picos_io_cohttp.0.6.0/opam
index 0c49df68e05..1d293c95f72 100644
--- a/packages/picos_io_cohttp/picos_io_cohttp.0.6.0/opam
+++ b/packages/picos_io_cohttp/picos_io_cohttp.0.6.0/opam
@@ -8,7 +8,7 @@ bug-reports: "https://github.com/ocaml-multicore/picos/issues"
 depends: [
   "dune" {>= "3.14"}
   "picos_io" {= version}
-  "cohttp" {>= "6.0.0~beta2"}
+  "cohttp" {>= "6.0.0~beta2" & < "6.0.0"}
   "fmt" {>= "0.9.0"}
   "uri" {>= "4.4.0"}
   "odoc" {with-doc}