diff --git a/compiler/erg_common/config.rs b/compiler/erg_common/config.rs
index f1d9d483..0a273cb9 100644
--- a/compiler/erg_common/config.rs
+++ b/compiler/erg_common/config.rs
@@ -295,15 +295,23 @@ impl ErgConfig {
                         .expect("the value of `-py-command` is not a valid Python command");
                     cfg.py_command = Some(Box::leak(py_command.into_boxed_str()));
                 }
-                "--py-magic-num" | "--python-magic-number" => {
+                "--hex-py-magic-num" | "--hex-python-magic-number" => {
                     let s_hex_magic_num = args
                         .next()
-                        .expect("the value of `--py-magic-num` is not passed");
+                        .expect("the value of `--hex-py-magic-num` is not passed");
                     let first_byte = u8::from_str_radix(&s_hex_magic_num[0..=1], 16).unwrap();
                     let second_byte = u8::from_str_radix(&s_hex_magic_num[2..=3], 16).unwrap();
                     let py_magic_num = get_magic_num_from_bytes(&[first_byte, second_byte, 0, 0]);
                     cfg.py_magic_num = Some(py_magic_num);
                 }
+                "--py-magic-num" | "--python-magic-number" => {
+                    cfg.py_magic_num = Some(
+                        args.next()
+                            .expect("the value of `--py-magic-num` is not passed")
+                            .parse::<u32>()
+                            .expect("the value of `--py-magic-num` is not a number"),
+                    );
+                }
                 "--py-server-timeout" => {
                     cfg.py_server_timeout = args
                         .next()
diff --git a/tests/test.rs b/tests/test.rs
index e786c252..32a6e755 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -196,6 +196,7 @@ fn _exec_vm(file_path: &'static str) -> Result<i32, CompileErrors> {
     let mut cfg = ErgConfig::with_main_path(PathBuf::from(file_path));
     cfg.py_command = Some("python");
     cfg.target_version = Some(PythonVersion::new(3, Some(10), Some(8)));
+    cfg.py_magic_num = Some(3439);
     let mut vm = DummyVM::new(cfg);
     vm.exec()
 }