diff --git a/pkgs/development/python-modules/h11/default.nix b/pkgs/development/python-modules/h11/default.nix
index 98dd8eef6cbd..bb61c5310354 100644
--- a/pkgs/development/python-modules/h11/default.nix
+++ b/pkgs/development/python-modules/h11/default.nix
@@ -3,16 +3,18 @@
 , fetchPypi
 , pytestCheckHook
 , pythonOlder
+, httpcore
+, wsproto
 }:
 
 buildPythonPackage rec {
   pname = "h11";
-  version = "0.13.0";
+  version = "0.14.0";
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-cIE8ETUIeiSKTTjMDhoBgf+rIYgUGpPq9WeUDDlX/wY=";
+    sha256 = "sha256-jxn7vpnnJCD/NcALJ6NMuZN+kCqLgQ4siDAMbwo7aZ0=";
   };
 
   checkInputs = [ pytestCheckHook ];
@@ -20,6 +22,10 @@ buildPythonPackage rec {
   # Some of the tests use localhost networking.
   __darwinAllowLocalNetworking = true;
 
+  passthru.tests = {
+    inherit httpcore wsproto;
+  };
+
   meta = with lib; {
     description = "Pure-Python, bring-your-own-I/O implementation of HTTP/1.1";
     homepage = "https://github.com/python-hyper/h11";
diff --git a/pkgs/development/python-modules/httpcore/default.nix b/pkgs/development/python-modules/httpcore/default.nix
index 5016ece96f2f..61a3b8d73235 100644
--- a/pkgs/development/python-modules/httpcore/default.nix
+++ b/pkgs/development/python-modules/httpcore/default.nix
@@ -17,7 +17,7 @@
 
 buildPythonPackage rec {
   pname = "httpcore";
-  version = "0.15.0";
+  version = "0.16.2";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -26,14 +26,9 @@ buildPythonPackage rec {
     owner = "encode";
     repo = pname;
     rev = version;
-    hash = "sha256-FF3Yzac9nkVcA5bHVOz2ymvOelSfJ0K6oU8UWpBDcmo=";
+    hash = "sha256-bwGZ/B0jlvc1BmXVTo7gMP6PJIQuCHclkHjKQCgMsyU=";
   };
 
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace "h11>=0.11,<0.13" "h11>=0.11,<0.14"
-  '';
-
   propagatedBuildInputs = [
     anyio
     certifi
@@ -63,6 +58,12 @@ buildPythonPackage rec {
     "httpcore"
   ];
 
+  preCheck = ''
+    # remove upstreams pytest flags which cause:
+    # httpcore.ConnectError: TLS/SSL connection has been closed (EOF) (_ssl.c:997)
+    rm setup.cfg
+  '';
+
   pytestFlagsArray = [
     "--asyncio-mode=strict"
   ];