Update app.py

app.py

@@ -8,6 +8,7 @@ try:
     from transformers import pipeline
 except ModuleNotFoundError:
     subprocess.check_call([sys.executable, "-m", "pip", "install", 'transformers'])
+    subprocess.check_call([sys.executable, "-m", "pip", "install", 'keras==2.4.3'])
     subprocess.check_call([sys.executable, "-m", "pip", "install", 'tensorflow==2.2.0'])
 
 finally: