diff --git a/pkgs/development/libraries/s2n-tls/default.nix b/pkgs/development/libraries/s2n-tls/default.nix
index 3d3193f7e108..bbfa1c9e829c 100644
--- a/pkgs/development/libraries/s2n-tls/default.nix
+++ b/pkgs/development/libraries/s2n-tls/default.nix
@@ -6,13 +6,13 @@
 
 stdenv.mkDerivation rec {
   pname = "s2n-tls";
-  version = "1.3.12";
+  version = "1.3.20";
 
   src = fetchFromGitHub {
     owner = "aws";
     repo = pname;
     rev = "v${version}";
-    sha256 = "1n1bak4s67cfizh8j5wpf05kfdcjvwqaca4rq9qys25z52bbpn9f";
+    sha256 = "sha256-U/mrtDlpBJm2nAjb8bgn36vzuN7civQ1mKguNogr0nE=";
   };
 
   nativeBuildInputs = [ cmake ];