Update README.md

README.md

@@ -117,11 +117,11 @@ Apache 2.0
 
 # Usage (unbabel-comet)
 
-Using this model requires unbabel-comet to be installed:
+Using this model requires unbabel-comet (>=2.0.0) to be installed:
 
 ```bash
 pip install --upgrade pip  # ensures that pip is current 
-pip install unbabel-comet
+pip install "unbabel-comet>=2.0.0"
 ```
 
 Then you can use it through comet CLI: