Upgrade PIP

app.py

@@ -4,7 +4,8 @@ import time
 import os
 
 def start_server():    
-    os.system("cat custom_req.txt | xargs -n 1 -L 1 pip3 install -U")
+    os.system("!python -m pip install -qq --upgrade pip")
+    os.system("cat custom_req.txt | xargs -n 1 -L 1 pip install -U")
     os.system("uvicorn InferenceServer:app --port 8080 --host 0.0.0.0 --workers 1")
 
 def load_models():