diff --git a/lane.py b/lane.py
index 8859880..a1bdd65 100644
--- a/lane.py
+++ b/lane.py
@@ -223,7 +223,7 @@ def warper(img, M):
 ## fit the lane line
 def full_search(binary_warped, visualization=False):
 
-    histogram = np.sum(binary_warped[binary_warped.shape[0]/2:,:], axis=0)
+    histogram = np.sum(binary_warped[binary_warped.shape[0]//2:,:], axis=0)
     # Create an output image to draw on and  visualize the result
     out_img = np.dstack((binary_warped, binary_warped, binary_warped))*255
     out_img = out_img.astype('uint8')
@@ -484,10 +484,10 @@ def create_output_frame(offcenter, pts, undist_ori, fps, curvature, curve_direct
     ############## generate the combined output frame only for visualization purpose ################
     whole_frame[40:40+h, 20:20+w, :] = undist_ori
     whole_frame[40:40+h, 60+w:60+2*w, :] = output
-    whole_frame[220+h/2:220+2*h/2, 20:20+w/2, :] = undist_birdview
-    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 0] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
-    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 1] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
-    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 2] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
+    whole_frame[220+h//2:220+2*h//2, 20:20+w//2, :] = undist_birdview
+    whole_frame[220+h//2:220+2*h//2, 40+w//2:40+w, 0] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
+    whole_frame[220+h//2:220+2*h//2, 40+w//2:40+w, 1] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
+    whole_frame[220+h//2:220+2*h//2, 40+w//2:40+w, 2] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
 
     font = cv2.FONT_HERSHEY_SIMPLEX
     if offcenter >= 0: