diff --git a/python-codes/requirements.txt b/python-codes/requirements.txt
old mode 100755
new mode 100644
index 1a0b66c..cf67686
--- a/python-codes/requirements.txt
+++ b/python-codes/requirements.txt
@@ -12,7 +12,7 @@ requests==2.20.0
 requests-oauthlib==0.8.0
 sortedcontainers==2.0.4
 tweepy==3.6.0
-urllib3==1.23
+urllib3==1.26.5
 isodate==0.6.0
 pyparsing==2.3.0
 rdflib==4.2.2