diff --git a/.travis.yml b/.travis.yml
index 7391b11f3..f53d7b8d8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-dist: bionic
+dist: xenial
 
 services:
   - postgresql
@@ -42,6 +42,12 @@ jobs:
     - language: php
       php: 7.2
       stage: test
+    - language: php
+      php: 7.0
+      stage: test
+    - language: php
+      php: 5.6
+      stage: test
     - language: python
       python: 3.8
       stage: test