diff --git a/helpers/helm-tester/Dockerfile b/helpers/helm-tester/Dockerfile
index 8843743ee..0ed2bd1a4 100644
--- a/helpers/helm-tester/Dockerfile
+++ b/helpers/helm-tester/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:2.7-onbuild
+FROM python:3.6-onbuild
 
 ENV HELM_VERSION=2.14.0