diff --git a/coreplugins/changedetection/compare.py b/coreplugins/changedetection/compare.py
index f17b23c9..6f30b7e1 100644
--- a/coreplugins/changedetection/compare.py
+++ b/coreplugins/changedetection/compare.py
@@ -1,11 +1,17 @@
 import rasterio as rio
 from rasterio import warp, transform
 import numpy as np
-import cv2
 import json
+import sys
+import os
 from geojson import Feature, FeatureCollection, dumps, Polygon
 from rasteralign import align, align_altitudes
 
+from webodm import settings
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", settings.MEDIA_ROOT, "plugins", "elevationmap", "site-packages"))
+import cv2
+
 KERNEL_10_10 = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (10, 10))
 KERNEL_20_20 = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (20, 20))
 
@@ -112,6 +118,7 @@ def calculate_heatmap(diff, mask, dem, epsg, min_height):
     xs = pixels[:, 0]
     ys = pixels[:, 1]
 
+
     # Map pixels to coordinates
     coords_xs, coords_ys = map_pixels_to_coordinates(dem, epsg, xs, ys)
 
diff --git a/coreplugins/changedetection/requirements.txt b/coreplugins/changedetection/requirements.txt
index 6a5e1083..7197cf6f 100644
--- a/coreplugins/changedetection/requirements.txt
+++ b/coreplugins/changedetection/requirements.txt
@@ -1,3 +1,3 @@
 geojson==2.4.1
-opencv-python==4.4.0.44
-scipy==1.2.1
+opencv-python-headless==4.4.0.46
+
diff --git a/coreplugins/elevationmap/elevationmap.py b/coreplugins/elevationmap/elevationmap.py
index 79b4e24e..806a1bbf 100755
--- a/coreplugins/elevationmap/elevationmap.py
+++ b/coreplugins/elevationmap/elevationmap.py
@@ -45,7 +45,7 @@
 #%end
 
 
-import cv2, math, argparse
+import math, argparse
 import numpy as np
 import rasterio as rio
 from rasterio import warp, transform
@@ -56,6 +56,10 @@ import glob
 import shutil
 import sys
 import grass.script as grass
+from webodm import settings
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", settings.MEDIA_ROOT, "plugins", "elevationmap", "site-packages"))
+import cv2
 
 def main():
     ext = ""
diff --git a/coreplugins/elevationmap/requirements.txt b/coreplugins/elevationmap/requirements.txt
index c5f0c0ea..b24a8f23 100644
--- a/coreplugins/elevationmap/requirements.txt
+++ b/coreplugins/elevationmap/requirements.txt
@@ -1,2 +1,2 @@
 geojson==2.4.1
-opencv-python==4.4.0.44
+opencv-python-headless==4.4.0.46