diff --git a/pkgs/development/libraries/nghttp3/default.nix b/pkgs/development/libraries/nghttp3/default.nix
index 4aaaefe1eb79..21e0cff3b87a 100644
--- a/pkgs/development/libraries/nghttp3/default.nix
+++ b/pkgs/development/libraries/nghttp3/default.nix
@@ -6,13 +6,13 @@
 
 stdenv.mkDerivation rec {
   pname = "nghttp3";
-  version = "0.15.0";
+  version = "1.0.0";
 
   src = fetchFromGitHub {
     owner = "ngtcp2";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-ZnfwPgjBAI2elHrx7uzc3JX2MdeX/hsrFKj4TfMK2tI=";
+    hash = "sha256-mw0zI7528lvEZlv+/KuST7PWjuu37p/+EGGsjIEto2Q=";
   };
 
   outputs = [ "out" "dev" "doc" ];
diff --git a/pkgs/development/libraries/ngtcp2/default.nix b/pkgs/development/libraries/ngtcp2/default.nix
index d276311a243f..1d716704c104 100644
--- a/pkgs/development/libraries/ngtcp2/default.nix
+++ b/pkgs/development/libraries/ngtcp2/default.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation rec {
   pname = "ngtcp2";
-  version = "0.19.1";
+  version = "1.0.0";
 
   src = fetchFromGitHub {
     owner = "ngtcp2";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-agiQRy/e5VS+ANxajXYi5huRjQQ2M8eddH/AzmwnHdQ==";
+    hash = "sha256-dnYIRcNGTIzETu2OjTJa0IWB1+xttdGFKRBmMkTwrXk=";
   };
 
   outputs = [ "out" "dev" "doc" ];