diff --git a/.travis.yml b/.travis.yml
index 9e607d70..e14ce64f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
+  - "3.7"
 install: pip install tox-travis
 script: tox
 
diff --git a/hscommon b/hscommon
index 17a12618..a56aee2f 160000
--- a/hscommon
+++ b/hscommon
@@ -1 +1 @@
-Subproject commit 17a12618074ccb1e2e66df566c55c621dd8503a7
+Subproject commit a56aee2f08becba9b968ff96caa3a7f6651a4c74