diff --git a/pkgs/servers/irc/charybdis/default.nix b/pkgs/servers/irc/charybdis/default.nix
index f63fecb66c88..b2288336d579 100644
--- a/pkgs/servers/irc/charybdis/default.nix
+++ b/pkgs/servers/irc/charybdis/default.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchFromGitHub, bison, flex, openssl }:
 
 stdenv.mkDerivation rec {
-  name = "charybdis-3.5.3";
+  name = "charybdis-3.5.5";
 
   src = fetchFromGitHub {
     owner = "charybdis-ircd";
     repo = "charybdis";
     rev = name;
-    sha256 = "1s8p26lrc5vm08gi6hc5gqidgyj7v5bzm4d2g81v4xk387f85lnc";
+    sha256 = "16bl516hcj1chgzkfnpg9bf9s6zr314pqzhlz6641lgyzaw1z3w0";
   };
 
   patches = [