diff --git a/nixos/doc/manual/release-notes/rl-2105.xml b/nixos/doc/manual/release-notes/rl-2105.xml
index 5fbef88c4a5c..6e4a9e7114b0 100644
--- a/nixos/doc/manual/release-notes/rl-2105.xml
+++ b/nixos/doc/manual/release-notes/rl-2105.xml
@@ -94,6 +94,12 @@
      been introduced.
     </para>
    </listitem>
+   <listitem>
+    <para>
+      <link xlink:href="https://nginx.org">Nginx</link> has been updated to stable version 1.20.0.
+      Now nginx uses the zlib-ng library by default.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>
 
diff --git a/pkgs/servers/http/nginx/mainline.nix b/pkgs/servers/http/nginx/mainline.nix
index 0409f6a26ea4..b7a11fc240d7 100644
--- a/pkgs/servers/http/nginx/mainline.nix
+++ b/pkgs/servers/http/nginx/mainline.nix
@@ -1,6 +1,6 @@
 { callPackage, ... }@args:
 
 callPackage ./generic.nix args {
-  version = "1.19.9";
-  sha256 = "0hfqqyfgqa6wqazmb3d434nb3r5p8szfisa0m6nfh9lqdbqdyd9f";
+  version = "1.20.0";
+  sha256 = "072dn2qhgx20y4pfa3mi97qszbifhcnwj28ccin4iamwivn93vsl";
 }
diff --git a/pkgs/servers/http/nginx/stable.nix b/pkgs/servers/http/nginx/stable.nix
index c08615ef5125..5972177204fc 100644
--- a/pkgs/servers/http/nginx/stable.nix
+++ b/pkgs/servers/http/nginx/stable.nix
@@ -1,6 +1,6 @@
 { callPackage, ... } @ args:
 
 callPackage ./generic.nix args {
-  version = "1.18.0";
-  sha256 = "16azscl74ym1far0s0p6xsjin1k1cm4wk80i9x5d74dznmx3wdsc";
+  version = "1.20.0";
+  sha256 = "072dn2qhgx20y4pfa3mi97qszbifhcnwj28ccin4iamwivn93vsl";
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9fe55d433d1a..9cd45c2b5841 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18803,6 +18803,7 @@ in
   nginx = nginxStable;
 
   nginxQuic = callPackage ../servers/http/nginx/quic.nix {
+    zlib = zlib-ng.override { withZlibCompat = true; };
     withPerl = false;
     # We don't use `with` statement here on purpose!
     # See https://github.com/NixOS/nixpkgs/pull/10474/files#r42369334
@@ -18812,6 +18813,7 @@ in
   };
 
   nginxStable = callPackage ../servers/http/nginx/stable.nix {
+    zlib = zlib-ng.override { withZlibCompat = true; };
     withPerl = false;
     # We don't use `with` statement here on purpose!
     # See https://github.com/NixOS/nixpkgs/pull/10474/files#r42369334
@@ -18819,6 +18821,7 @@ in
   };
 
   nginxMainline = callPackage ../servers/http/nginx/mainline.nix {
+    zlib = zlib-ng.override { withZlibCompat = true; };
     withPerl = false;
     # We don't use `with` statement here on purpose!
     # See https://github.com/NixOS/nixpkgs/pull/10474/files#r42369334