diff --git a/.drone.yml b/.drone.yml
index b70321e..881754b 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -13,5 +13,6 @@ matrix:
     - 3.7
     - 3.8
   PYTHON_VERSION:
+    - 3.5
     - 3.6
     - 3.7