diff --git a/fcos/bin/fcos b/fcos/bin/fcos
index e2d309ab..c34167e7 100644
--- a/fcos/bin/fcos
+++ b/fcos/bin/fcos
@@ -23,36 +23,37 @@ def pretty_print(bbox_results):
         ))
 
 
-parser = argparse.ArgumentParser(description="FCOS Object Detector")
-parser.add_argument(
-    "input_image",
-    help="path or url to an input image",
-)
-args = parser.parse_args()
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="FCOS Object Detector")
+    parser.add_argument(
+        "input_image",
+        help="path or url to an input image",
+    )
+    args = parser.parse_args()
 
-fcos = FCOS(
-    model_name="fcos_syncbn_bs32_c128_MNV2_FPN_1x",
-    nms_thresh=0.6,
-    cpu_only=not torch.cuda.is_available()  # if you do not have GPUs, please set cpu_only as True
-)
+    fcos = FCOS(
+        model_name="fcos_syncbn_bs32_c128_MNV2_FPN_1x",
+        nms_thresh=0.6,
+        cpu_only=not torch.cuda.is_available()  # if you do not have GPUs, please set cpu_only as True
+    )
 
-im = io.imread(args.input_image)
-assert im.shape[-1] == 3, "only 3-channel images are supported"
+    im = io.imread(args.input_image)
+    assert im.shape[-1] == 3, "only 3-channel images are supported"
 
-# convert from RGB to BGR because fcos assumes the BRG input image
-im = im[..., ::-1].copy()
+    # convert from RGB to BGR because fcos assumes the BRG input image
+    im = im[..., ::-1].copy()
 
-# resize image to have its shorter size == 800
-f = 800.0 / float(min(im.shape[:2]))
-im = cv2.resize(im, (0, 0), fx=f, fy=f)
+    # resize image to have its shorter size == 800
+    f = 800.0 / float(min(im.shape[:2]))
+    im = cv2.resize(im, (0, 0), fx=f, fy=f)
 
-start_time = time.time()
+    start_time = time.time()
 
-bbox_results = fcos.detect(im)
+    bbox_results = fcos.detect(im)
 
-inference_time = time.time() - start_time
+    inference_time = time.time() - start_time
 
-pretty_print(bbox_results)
-print("Predicted in {:.2f} seconds.".format(inference_time))
-print("Press any key to exit...")
-fcos.show_bboxes(im, bbox_results)
+    pretty_print(bbox_results)
+    print("Predicted in {:.2f} seconds.".format(inference_time))
+    print("Press any key to exit...")
+    fcos.show_bboxes(im, bbox_results)