diff --git a/default.prf b/default.prf
index e1636145..7db2a16a 100644
--- a/default.prf
+++ b/default.prf
@@ -197,6 +197,7 @@ config-data=sysctl;kernel.randomize_va_space;2;1;Randomize of memory address loc
 config-data=sysctl;kernel.suid_dumpable;0;1;Restrict core dumps;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.sysrq;0;1;Disable magic SysRQ;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.use-nx;0;1;No description;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
+config-data=sysctl;kernel.yama.ptrace_scope;1|2|3;1;Disable process tracing for everyone;-;category:security;
 
 # Network
 config-data=sysctl;net.inet.ip.linklocal.in.allowbadttl;0;