diff --git a/src/main.cpp b/src/main.cpp
index f29112e..18727ea 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -97,6 +97,9 @@ static bool enableSecurity() {
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(recvfrom), 0);
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(fcntl), 0);
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(uname), 0);
+	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(sigprocmask), 0);
+	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(rt_sigprocmask), 0);
+	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(sigprocmask), 0);
 
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(clone), 0); // curl wants to spawn threads
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(mmap), 0);