diff --git a/pkgs/tools/networking/shadowsocks-libev/default.nix b/pkgs/tools/networking/shadowsocks-libev/default.nix
index b6051ef26b0..c9ff4c7f649 100644
--- a/pkgs/tools/networking/shadowsocks-libev/default.nix
+++ b/pkgs/tools/networking/shadowsocks-libev/default.nix
@@ -5,14 +5,14 @@
 
 stdenv.mkDerivation rec {
   pname = "shadowsocks-libev";
-  version = "3.3.3";
+  version = "3.3.4";
 
   # Git tag includes CMake build files which are much more convenient.
   src = fetchFromGitHub {
     owner = "shadowsocks";
     repo = pname;
     rev = "refs/tags/v${version}";
-    sha256 = "1i2431imbn4bhwmwyz63g5mh1g5ikhsiwv6mzcdc2kx34zjpibrj";
+    sha256 = "05f1vvd0r0wanbb61rf4p6y991jp7625l0i223v23r2ji43y3i5a";
     fetchSubmodules = true;
   };