diff --git a/.ci/convert_notebooks.py b/.ci/convert_notebooks.py
index ae1066e2494..35212989a3e 100644
--- a/.ci/convert_notebooks.py
+++ b/.ci/convert_notebooks.py
@@ -1,6 +1,6 @@
 import argparse
 import shutil
-import subprocess
+import subprocess # nosec - disable B404:import-subprocess check
 import time
 from pathlib import Path
 
diff --git a/.ci/validate_notebooks.py b/.ci/validate_notebooks.py
index dfa28958294..e3bfd205660 100644
--- a/.ci/validate_notebooks.py
+++ b/.ci/validate_notebooks.py
@@ -1,6 +1,6 @@
 import sys
 import os
-import subprocess
+import subprocess # nosec - disable B404:import-subprocess check
 import csv
 import shutil
 from pathlib import Path
diff --git a/check_install.py b/check_install.py
index f3aad4c77ec..1bf161afd16 100644
--- a/check_install.py
+++ b/check_install.py
@@ -1,5 +1,5 @@
 import os
-import subprocess
+import subprocess # nosec - disable B404:import-subprocess check
 import sys
 from pathlib import Path
 from pprint import pprint
diff --git a/notebooks/405-paddle-ocr-webcam/pre_post_processing.py b/notebooks/405-paddle-ocr-webcam/pre_post_processing.py
index 74ad23dc61d..e17a9f14a2e 100644
--- a/notebooks/405-paddle-ocr-webcam/pre_post_processing.py
+++ b/notebooks/405-paddle-ocr-webcam/pre_post_processing.py
@@ -3,7 +3,6 @@
 import numpy as np
 import paddle
 import math
-import random
 
 from PIL import Image, ImageDraw, ImageFont
 import copy
@@ -423,14 +422,14 @@ def draw_ocr_box_txt(image,
     img_left = image.copy()
     img_right = Image.new('RGB', (w, h), (255, 255, 255))
 
-    random.seed(0)
+    np.random.seed(0)
     draw_left = ImageDraw.Draw(img_left)
     draw_right = ImageDraw.Draw(img_right)
     for idx, (box, txt) in enumerate(zip(boxes, txts)):
         if scores is not None and scores[idx] < drop_score:
             continue
-        color = (random.randint(0, 255), random.randint(0, 255),
-                 random.randint(0, 255))
+        color = (np.random.randint(0, 255), np.random.randint(0, 255),
+                 np.random.randint(0, 255))
         draw_left.polygon(box, fill=color)
         draw_right.polygon(
             [