diff --git a/{{cookiecutter.project_slug}}/runtime.txt b/{{cookiecutter.project_slug}}/runtime.txt
index 5486d7ad..cfa5aa5c 100644
--- a/{{cookiecutter.project_slug}}/runtime.txt
+++ b/{{cookiecutter.project_slug}}/runtime.txt
@@ -1 +1 @@
-python-3.5.3
+python-3.6.2