diff --git a/4_alpha_research_and_factor_modeling/requirements.txt b/4_alpha_research_and_factor_modeling/requirements.txt
index 5d18d29..2edfe7f 100644
--- a/4_alpha_research_and_factor_modeling/requirements.txt
+++ b/4_alpha_research_and_factor_modeling/requirements.txt
@@ -8,7 +8,7 @@ plotly==2.2.3
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.3
-requests==2.18.4
+requests==2.20.0
 scipy==1.0.0
 scikit-learn==0.19.1
 six==1.11.0