diff --git a/pkgs/ngtcp2/default.nix b/pkgs/ngtcp2/default.nix
index 2a5547e..0668a7d 100644
--- a/pkgs/ngtcp2/default.nix
+++ b/pkgs/ngtcp2/default.nix
@@ -8,7 +8,7 @@
 
 stdenv.mkDerivation rec {
   pname = "ngtcp2";
-  version = "20210817";
+  version = "20210818";
 
   src = fetchFromGitHub {
     owner = "ngtcp2";