diff --git a/dune-project b/dune-project
index 99cd43e1..f483593d 100644
--- a/dune-project
+++ b/dune-project
@@ -92,7 +92,7 @@
    (= :version))
   ;;
   (cohttp
-   (>= 6.0.0~beta2))
+   (>= 6.0.0))
   (fmt
    (>= 0.9.0))
   (uri
@@ -175,11 +175,11 @@
     :with-test))
   (cohttp
    (and
-    (>= 6.0.0~beta2)
+    (>= 6.0.0)
     :with-test))
   (cohttp-lwt-unix
    (and
-    (>= 6.0.0~beta2)
+    (>= 6.0.0)
     (<> :os "win32")
     :with-test))
   (conduit-lwt-unix
@@ -223,7 +223,7 @@
     :with-test))
   (cohttp-lwt
    (and
-    (>= 6.0.0~beta2)
+    (>= 6.0.0)
     :with-test))
   (qcheck-multicoretests-util
    (and
diff --git a/lib/picos_io_cohttp/picos_io_cohttp.ml b/lib/picos_io_cohttp/picos_io_cohttp.ml
index 3d73ee88..c40a9b12 100644
--- a/lib/picos_io_cohttp/picos_io_cohttp.ml
+++ b/lib/picos_io_cohttp/picos_io_cohttp.ml
@@ -242,7 +242,7 @@ module Server = struct
     let callback conn req body = `Response (callback conn req body) in
     make_response_action ?conn_closed ~callback ()
 
-  let respond ?headers ?flush ~status ~body () =
+  let respond ?headers ~status ~body () =
     let encoding =
       match headers with
       | None -> Cohttp.Body.transfer_encoding body
@@ -251,12 +251,12 @@ module Server = struct
           | Http.Transfer.Unknown -> Cohttp.Body.transfer_encoding body
           | t -> t)
     in
-    let res = Cohttp.Response.make ~status ?flush ~encoding ?headers () in
+    let res = Cohttp.Response.make ~status ~encoding ?headers () in
     (res, body)
 
-  let respond_string ?headers ?flush ~status ~body () =
+  let respond_string ?headers ~status ~body () =
     let res =
-      Cohttp.Response.make ~status ?flush
+      Cohttp.Response.make ~status
         ~encoding:(Http.Transfer.Fixed (Int64.of_int (String.length body)))
         ?headers ()
     in
@@ -288,7 +288,9 @@ module Server = struct
                 (if keep_alive then "keep-alive" else "close")
             in
             let res = { res with headers } in
-            Response.write (Body.write_with Response.write_body body) res oc;
+            Response.write ~flush:false
+              (Body.write_with Response.write_body body)
+              res oc;
             if keep_alive then handle t conn ic oc
       end
 
diff --git a/picos_io_cohttp.opam b/picos_io_cohttp.opam
index 21a3a12d..7a7afe49 100644
--- a/picos_io_cohttp.opam
+++ b/picos_io_cohttp.opam
@@ -10,7 +10,7 @@ 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"}
   "fmt" {>= "0.9.0"}
   "uri" {>= "4.4.0"}
   "odoc" {with-doc}
diff --git a/picos_meta.opam b/picos_meta.opam
index b90d47f4..9480e905 100644
--- a/picos_meta.opam
+++ b/picos_meta.opam
@@ -22,8 +22,8 @@ depends: [
   "qcheck-stm" {>= "0.3"}
   "alcotest" {>= "1.7.0" & with-test}
   "backoff" {>= "0.1.0" & with-test}
-  "cohttp" {>= "6.0.0~beta2" & with-test}
-  "cohttp-lwt-unix" {>= "6.0.0~beta2" & os != "win32" & with-test}
+  "cohttp" {>= "6.0.0" & with-test}
+  "cohttp-lwt-unix" {>= "6.0.0" & os != "win32" & with-test}
   "conduit-lwt-unix" {>= "6.2.2" & os != "win32" & with-test}
   "conf-npm"
     {arch != "x86_32" & arch != "riscv64" & os != "win32" & with-test}
@@ -34,7 +34,7 @@ depends: [
   "multicore-magic" {>= "2.3.0" & with-test}
   "multicore-magic-dscheck" {>= "2.3.0" & with-test}
   "ocaml-version" {>= "3.6.4" & with-test}
-  "cohttp-lwt" {>= "6.0.0~beta2" & with-test}
+  "cohttp-lwt" {>= "6.0.0" & with-test}
   "qcheck-multicoretests-util" {>= "0.3" & with-test}
   "uri" {>= "4.4.0" & with-test}
   "odoc" {>= "2.4.1" & with-doc}