diff --git a/dune-project b/dune-project
index 9ffbf7ce..b3744800 100644
--- a/dune-project
+++ b/dune-project
@@ -29,6 +29,7 @@
  (depends
   (ocaml
    (>= "4.08.0"))
+  angstrom
   (faraday
    (>= "0.7.3"))
   (yojson :with-test)
@@ -118,7 +119,7 @@
    (= :version))
   faraday-async
   (gluten-async
-   (>= "0.2.1")))
+   (>= "0.4.0")))
  (depopts async_ssl tls-async))
 
 (package
diff --git a/flake.lock b/flake.lock
index 2f7da085..307dd40b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -38,11 +38,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1679089279,
-        "narHash": "sha256-/E2WWID6OAZrY4yYHLv4Ep9CyAJXnm+8x/FE2fIturQ=",
+        "lastModified": 1679257633,
+        "narHash": "sha256-b1nQZAofP8Gkxge51j0O/F/LM8wH0bMCNZVDXr5k2Rs=",
         "owner": "anmonteiro",
         "repo": "nix-overlays",
-        "rev": "5d30ba75783cc896462e0a9585f234cd82e9ef83",
+        "rev": "d767c2bd906de48e16c2a9610f81ac69d91114d7",
         "type": "github"
       },
       "original": {
@@ -53,17 +53,17 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1679070947,
-        "narHash": "sha256-0da0x/w+QmfrRwCtV2pf1MRM1Zhaic5lKnQ6xH9zV6A=",
+        "lastModified": 1679220753,
+        "narHash": "sha256-PTIvwZPtF1/IuJL8PAlqJ13lpRPCdzwiTKHidE8VvkE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "518d5f094122e73f001204c57b37c9e4d27fd34f",
+        "rev": "1283da924bcb995d5a2dfd853f3527fa6f82ac2e",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "518d5f094122e73f001204c57b37c9e4d27fd34f",
+        "rev": "1283da924bcb995d5a2dfd853f3527fa6f82ac2e",
         "type": "github"
       }
     },
diff --git a/h2-async.opam b/h2-async.opam
index 5773985e..0d566811 100644
--- a/h2-async.opam
+++ b/h2-async.opam
@@ -13,7 +13,7 @@ depends: [
   "ocaml" {>= "4.08.0"}
   "h2" {= version}
   "faraday-async"
-  "gluten-async" {>= "0.2.1"}
+  "gluten-async" {>= "0.4.0"}
   "odoc" {with-doc}
 ]
 depopts: ["async_ssl" "tls-async"]
diff --git a/hpack.opam b/hpack.opam
index dfbb9369..38bc8a98 100644
--- a/hpack.opam
+++ b/hpack.opam
@@ -11,6 +11,7 @@ bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 depends: [
   "dune" {>= "2.7"}
   "ocaml" {>= "4.08.0"}
+  "angstrom"
   "faraday" {>= "0.7.3"}
   "yojson" {with-test}
   "hex" {with-test}