diff --git a/.travis.yml b/.travis.yml
index ef289b4..36472f0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: php
 php:
   - '5.6'
-  - '7.0'
+  - '7.0.23'
   - '7.1'
 before_script:
   - nvm install 4