diff --git a/.travis.yml b/.travis.yml
index 26835b877f8..4dcde4c2130 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,9 @@ php:
   - 7.0
   - 7.1
 
+cache:
+  apt: true
+
 env:
   - WP_VERSION=latest WP_MULTISITE=0 PHP_LATEST_STABLE=7.1
 
@@ -20,10 +23,10 @@ matrix:
     env: WP_VERSION=latest WP_MULTISITE=1 PHP_LATEST_STABLE=7.1
     dist: precise
   - php: 5.3
-    env: WP_VERSION=master
+    env: WP_VERSION=latest
     dist: precise
   - php: 5.2
-    env: WP_VERSION=master
+    env: WP_VERSION=latest
     dist: precise
 
 before_script: