update versions

setup.py

@@ -38,12 +38,12 @@ setup(
         'visdom',
         'Pillow',
         'future',
-        'torch',
+        'torch>=1.2.0,<1.6.0',
         'numpy>=1.15.0',
         'scipy',
         'scikit-learn==0.20.3',
         'pytorch-pretrained-bert>=0.6.1',
-        'transformers>=2.3.0',
+        'transformers>=2.3.0,<3.0.0',
         'tensorflow==1.14',
         'tensorboard>=1.14.0',
         'tensorboardX==1.7',