diff --git a/pkgs/ngtcp2/default.nix b/pkgs/ngtcp2/default.nix
index 0668a7d..4d49872 100644
--- a/pkgs/ngtcp2/default.nix
+++ b/pkgs/ngtcp2/default.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation rec {
   pname = "ngtcp2";
-  version = "20210818";
+  version = "20211031";
 
   src = fetchFromGitHub {
     owner = "ngtcp2";
     repo = "ngtcp2";
-    rev = "2b75b57708fd865db4c1b8167714865242e2f3e4";
-    sha256 = "0gwpmfacx3cd2a3d7yv041zd58qncill1ykj3jsvm54ab00qy8fa";
+    rev = "f91edc489e2ce77603f8e101a24a9c7726265ef7";
+    sha256 = "0x486vwg5w1yz7jl8vi2nc8dyjv78p03ygfcxgfqwdmiq60iflhy";
   };
 
   outputs = [ "out" "dev" ];