fixing dependency packages versions

Author: Cheukting

README.md

@@ -157,7 +157,10 @@ Then we tell rasa to train the NLU.
 
 The trained model should be saved under `models/`.
 
- Now we can test the NLU model that we trained:
+> Notes:
+> You can ignore all the future warnings for now as we will only use the current version in the workshop.
+
+Now we can test the NLU model that we trained:
 
 `rasa shell nlu`
 

requirements.txt

@@ -1,4 +1,4 @@
-nltk>=3.4.3
-rasa>=1.1.3
-spacy>=2.1.4
-cherrypy>=18.1.2
+nltk==3.4.3
+rasa==1.1.3
+spacy==2.1.4
+cherrypy==18.1.2