diff --git a/.travis.yml b/.travis.yml
index 976d9efc..a80957ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,3 +18,8 @@ script:
 after_script:
   - php coveralls.phar -v;
 
+matrix:
+  include:
+    - php: 7.1
+      env: coverage=yes
+  fast_finish: true  
diff --git a/src/core b/src/core
index 6ffe11f2..436586e1 160000
--- a/src/core
+++ b/src/core
@@ -1 +1 @@
-Subproject commit 6ffe11f2192f44651f4192e96eacb5e2bf028f38
+Subproject commit 436586e10dabb95563b366c3ac613507550c75ed