diff --git a/pkgs/tools/networking/stunnel/default.nix b/pkgs/tools/networking/stunnel/default.nix
index e00b5335d35e..b85e146971b2 100644
--- a/pkgs/tools/networking/stunnel/default.nix
+++ b/pkgs/tools/networking/stunnel/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name    = "stunnel-${version}";
-  version = "5.50";
+  version = "5.53";
 
   src = fetchurl {
     url    = "https://www.stunnel.org/downloads/${name}.tar.gz";
-    sha256 = "0j811iakljjxw39qchmqf235jdkwixb0i4xxjyi55f08558947cm";
+    sha256 = "119560alb8k0qz2zkjb2i80ikmn76fa6dg681fvrw9hlxsb9hhw0";
     # please use the contents of "https://www.stunnel.org/downloads/${name}.tar.gz.sha256",
     # not the output of `nix-prefetch-url`
   };