diff --git a/README.md b/README.md
index f4bc493..509c433 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,8 @@ This library will have methods for processing historical English corpora, especi
 
 Note: It is highly recommended to use a virtual environment because of the strict version requirements for dependencies
 
-    sudo pip3 install natas --process-dependency-links --allow-all-external 
+    pip3 --no-cache-dir install pip==18.1
+    pip3 install natas --process-dependency-links 
     spacy download en_core_web_md #this step is optional, it's only needed if spacy was updated
 
 ## Historical normalization