Switch to old travis image to fix issue #169

konserw · konserw · commit eb04853d6d15 · 2017-09-23T15:30:30.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,5 @@
+group: deprecated-2017Q3
+
 language: cpp
 os: linux
 sudo: required
