diff --git a/deepface/basemodels/DlibResNet.py b/deepface/basemodels/DlibResNet.py
index ae00c2c..8e1c188 100644
--- a/deepface/basemodels/DlibResNet.py
+++ b/deepface/basemodels/DlibResNet.py
@@ -1,4 +1,4 @@
-import dlib
+import dlib #19.20.0
 import os
 import zipfile
 import bz2
diff --git a/deepface/commons/functions.py b/deepface/commons/functions.py
index ae0c61c..e1fa305 100644
--- a/deepface/commons/functions.py
+++ b/deepface/commons/functions.py
@@ -18,7 +18,6 @@ import tensorflow as tf
 import keras
 import bz2
 from deepface.commons import distance
-from mtcnn import MTCNN
 
 def loadBase64Img(uri):
    encoded_data = uri.split(',')[1]
@@ -276,7 +275,7 @@ def detect_face(img, detector_backend = 'opencv', grayscale = False, enforce_det
 				raise ValueError("Face could not be detected. Please confirm that the picture is a face photo or consider to set enforce_detection param to False.") 
 		
 	elif detector_backend == 'mtcnn':
-				
+		from mtcnn import MTCNN #0.1.0
 		mtcnn_detector = MTCNN()
 		
 		detections = mtcnn_detector.detect_faces(img)
@@ -432,6 +431,7 @@ def align_face(img, detector_backend = 'opencv'):
 	
 	elif detector_backend == 'mtcnn':
 		
+		from mtcnn import MTCNN #0.1.0
 		mtcnn_detector = MTCNN()
 		detections = mtcnn_detector.detect_faces(img)
 		
diff --git a/requirements.txt b/requirements.txt
index 51d35c7..65f5932 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,4 @@ Pillow>=5.2.0
 opencv-python>=3.4.4
 tensorflow>=1.9.0
 keras>=2.2.0
-Flask>=1.1.2
-lightgbm>=2.3.1
-dlib>=19.20.0
-mtcnn>=0.1.0
\ No newline at end of file
+Flask>=1.1.2
\ No newline at end of file