diff --git a/judge-core/src/run/sandbox.rs b/judge-core/src/run/sandbox.rs
index 2959107..2ba2c22 100644
--- a/judge-core/src/run/sandbox.rs
+++ b/judge-core/src/run/sandbox.rs
@@ -191,7 +191,7 @@ fn get_default_rusage() -> rusage {
     }
 }
 
-const DEFAULT_SCMP_WHITELIST: [&str; 27] = [
+const DEFAULT_SCMP_WHITELIST: [&str; 28] = [
     "read",
     "fstat",
     "mmap",
@@ -219,4 +219,5 @@ const DEFAULT_SCMP_WHITELIST: [&str; 27] = [
     "prlimit64",
     "futex",
     "openat",
+    "clock_nanosleep"
 ];