diff --git a/requirements.txt b/requirements.txt
index 54e0168..fdd7801 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,6 +21,6 @@ requests==2.21.0
 six==1.12.0
 twilio==6.21.0
 typed-ast==1.1.0
-urllib3==1.24.1
+urllib3==1.26.5
 Werkzeug==0.14.1
 wrapt==1.10.11
diff --git a/runtime.txt b/runtime.txt
index 486fcce..0c89a2d 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-3.6.5
+python-3.6.13