diff --git a/utils.py b/utils.py
index a2d8afe..85374c6 100644
--- a/utils.py
+++ b/utils.py
@@ -73,13 +73,13 @@ class RobotClient:
                     print(f"{RED}DEBUG: Exception in recv loop: {e}{RESET}")
                 break
 
-    def _send_single_json(self, cmd) -> dict:
+    def _send_single_json(self, cmd, timeout=5.0) -> dict:
         if DEBUG:
             print(f"{CYAN}DEBUG: sended:{RESET} {cmd}")
         self.sock.sendall(json.dumps(cmd).encode("utf-8"))
 
         try:
-            response = self._response_queue.get(timeout=5)
+            response = self._response_queue.get(timeout=timeout)
             try:
                 extra = self._response_queue.get_nowait()
                 raise RuntimeError(
@@ -170,7 +170,7 @@ class RobotClient:
 
     def move_line(self, joint_radian: list) -> None:
         cmd = {"command": "move_line", "joint_radian": joint_radian}
-        ret = self._send_single_json(cmd)
+        ret = self._send_single_json(cmd, 10.0)
         if (ret.get("ret") != 0):
             raise RuntimeError(f"move_line failed: {ret}")
         self.wait_untill_motion_is_done(10.0)