diff --git a/requirements.txt b/requirements.txt
index f1a13cae..05aa4734 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ six==1.11.0
 tqdm==4.20.0
 Twisted==17.9.0
 typing==3.6.4
-urllib3==1.22
+urllib3==1.26.5
 virtualenv==15.2.0
 wcwidth==0.1.7
 Werkzeug==0.14.1
diff --git a/requirements_docs.txt b/requirements_docs.txt
index c0cde52c..ca010ebc 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -66,7 +66,7 @@ sphinx-rtd-theme==0.2.4
 sphinxcontrib-websupport==1.0.1
 tqdm==4.19.5
 Twisted==17.9.0
-urllib3==1.22
+urllib3==1.26.5
 virtualenv==15.1.0
 wcwidth==0.1.7
 zope.interface==4.4.3
@@ -139,7 +139,7 @@ sphinx-rtd-theme==0.2.4
 sphinxcontrib-websupport==1.0.1
 tqdm==4.19.5
 Twisted==17.9.0
-urllib3==1.22
+urllib3==1.26.5
 virtualenv==15.1.0
 wcwidth==0.1.7
 zope.interface==4.4.3