diff --git a/pkgs/servers/monitoring/zabbix/versions.nix b/pkgs/servers/monitoring/zabbix/versions.nix
index d5d5cadc5991..f7a5a7f39973 100644
--- a/pkgs/servers/monitoring/zabbix/versions.nix
+++ b/pkgs/servers/monitoring/zabbix/versions.nix
@@ -5,8 +5,8 @@ generic: {
     vendorHash = null;
   };
   v64 = generic {
-    version = "6.4.15";
-    hash = "sha256-CtmNCuzDVchijinWcop3lGUTVGS2JbiQCbmusyXBQvY=";
+    version = "6.4.20";
+    hash = "sha256-tFsg2Jq8Uaa5YULGUu1kXLkxyJuA3YGeSfJ4DPfOHkk=";
     vendorHash = null;
   };
   v60 = generic {