diff --git a/README.md b/README.md
index f5f45f6..a0266bf 100755
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 We provided the evaluation script using target function proposed in the manuscript, as well as a gene2vec file in word2vec format.
 
 ## Introduction
-Gene2Vec is a distributed representation of genes based on co-expression. From a pure data-driven fashion, we trained a 
+Gene2Vec is a distributed representation of genes based on co-expression. From a pure data-driven fashion, we trained a
 200-dimension vector representation of all human genes, using gene co-expression patterns in 984 data sets from the GEO databases.
 
 In this repository, we provided the relevent codes as well as pre-trained gene2vec files.
@@ -25,6 +25,8 @@ cd Gene2vec/
 pip install -r requirements.txt
 ```
 
+*NOTE: If you get an error with `certifi`, add `--ignore-installed certifi` to the end of the `pip install` command.*
+
 ## Usage
 
 ### gene2vec.py
diff --git a/requirements.txt b/requirements.txt
index 73b85bd..4e1bd6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,7 @@
 tensorflow>=1.6.0
-gensim>=3.4.0
+gensim==3.4.0
 numpy>=1.14.0
-matplotlib>=2.1.2
\ No newline at end of file
+matplotlib>=2.1.2
+scikit-learn==0.18.2
+scipy==1.2.0
+MulticoreTSNE==0.1