diff --git a/software/prj.conf b/software/prj.conf
index b4c474e..138e1ba 100644
--- a/software/prj.conf
+++ b/software/prj.conf
@@ -11,6 +11,7 @@ CONFIG_NET_SOCKETS=y
 CONFIG_NET_ARP=y
 CONFIG_NET_UDP=y
 CONFIG_NET_DHCPV4=y
+CONFIG_NET_TCP_ISN_RFC6528=n
 
 CONFIG_INIT_STACKS=y
 
@@ -18,4 +19,3 @@ CONFIG_NET_CONFIG_SETTINGS=y
 CONFIG_NET_CONFIG_NEED_IPV4=y
 CONFIG_NET_MGMT=y
 CONFIG_NET_MGMT_EVENT=y
-CONFIG_TEST_RANDOM_GENERATOR=y