diff --git a/face_recognition/app/app.py b/face_recognition/app/app.py
index 5126cf3..8af57ca 100644
--- a/face_recognition/app/app.py
+++ b/face_recognition/app/app.py
@@ -86,7 +86,7 @@ def check_id(id):
     return known
 
 def save_img(encoded_data, filename):
-    nparr = np.fromstring(base64.b64decode(encoded_data), np.uint8)
+    nparr = np.fromstring(base64.urlsafe_b64decode(encoded_data), np.uint8)
     img = cv2.imdecode(nparr, cv2.IMREAD_ANYCOLOR)
     return cv2.imwrite(filename, img)