diff --git a/Rule-Based Extraction Method/requirements.txt b/Rule-Based Extraction Method/requirements.txt
index 37117b7..e680f23 100644
--- a/Rule-Based Extraction Method/requirements.txt	
+++ b/Rule-Based Extraction Method/requirements.txt	
@@ -91,7 +91,7 @@ unicodecsv==0.14.1
 unittest2==1.1.0
 urllib3==1.24.2
 vine==1.2.0
-virtualenv==16.4.0
+virtualenv==20.26.6
 wcwidth==0.1.7
 webencodings==0.5.1
 whitenoise==4.1.2