diff --git a/lfs/iperf3 b/lfs/iperf3
index dbbc5a5ce..7c4095ed9 100644
--- a/lfs/iperf3
+++ b/lfs/iperf3
@@ -1,7 +1,7 @@
 ###############################################################################
 #                                                                             #
 # IPFire.org - A linux based firewall                                         #
-# Copyright (C) 2007-2025  IPFire Team  <info@ipfire.org>                     #
+# Copyright (C) 2007-2026  IPFire Team  <info@ipfire.org>                     #
 #                                                                             #
 # This program is free software: you can redistribute it and/or modify        #
 # it under the terms of the GNU General Public License as published by        #
@@ -26,7 +26,7 @@ include Config
 
 SUMMARY    = A tool to measure network performance
 
-VER        = 3.19
+VER        = 3.21
 
 THISAPP    = iperf-$(VER)
 DL_FILE    = $(THISAPP).tar.gz
@@ -34,7 +34,7 @@ DL_FROM    = $(URL_IPFIRE)
 DIR_APP    = $(DIR_SRC)/$(THISAPP)
 TARGET     = $(DIR_INFO)/$(THISAPP)
 PROG       = iperf3
-PAK_VER    = 8
+PAK_VER    = 9
 
 DEPS       =
 
@@ -51,7 +51,7 @@ objects = $(DL_FILE)
 
 $(DL_FILE) = $(DL_FROM)/$(DL_FILE)
 
-$(DL_FILE)_BLAKE2 = b6f5e9bdef5ee3fc38bef893144bc6ad003ccbc7b3db4793dbd2aec5998faa55cac215a0db06ab37729dc1c05787ebacbf09db8a6e6517f82492a6c67ec3d9e6
+$(DL_FILE)_BLAKE2 = 696a13caaa5cf52a69c65566ae4d2d8788a4225d689d32e73306f5174dad141c92ea3acdda9a929803a1e57eee6844350be2da749e5f44c48bf0ab7890e97745
 
 install : $(TARGET)
 check : $(patsubst %,$(DIR_CHK)/%,$(objects))