diff --git a/pkgs/quicly/default.nix b/pkgs/quicly/default.nix
index 6e82fd7..0580999 100644
--- a/pkgs/quicly/default.nix
+++ b/pkgs/quicly/default.nix
@@ -23,13 +23,13 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "quicly";
-  version = "20201106";
+  version = "20201120";
 
   src = fetchFromGitHub {
     owner = "h2o";
     repo = "quicly";
-    rev = "f2f0e0a32fcf4e72404864007b08f01e84d6fef5";
-    sha256 = "1rhfhvkn6ssfmvgyay239bfcpqskzlj9xnl2ca0kmadbxng4xkv5";
+    rev = "9ef55a68701e38ed02dea9209faf00356da03a1f";
+    sha256 = "17iv58jmrdhvzax2gvqm8371qg2lqkklijbcwxc4iwijvpn7881m";
   };
 
   outputs = [ "out" "dev" ];