diff --git a/pkgs/servers/monitoring/zabbix/default.nix b/pkgs/servers/monitoring/zabbix/default.nix
index 1e46ffdbc85..ca4df9ce340 100644
--- a/pkgs/servers/monitoring/zabbix/default.nix
+++ b/pkgs/servers/monitoring/zabbix/default.nix
@@ -2,11 +2,11 @@
 
 let
 
-  version = "1.8.20";
+  version = "1.8.21";
 
   src = fetchurl {
     url = "mirror://sourceforge/zabbix/zabbix-${version}.tar.gz";
-    sha256 = "0psdvzg5c3yhdqqmy5m1b0j3nrvcshjywhl56igy0j8vj16zxi86";
+    sha256 = "1ssqi31blkl1lyv9vjrsrrn494grdng187s8xwfv79adk2w94paw";
   };
 
   preConfigure =