diff --git a/.travis.yml b/.travis.yml
index 8096475f6c7..56a20e8f9b5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ dist: trusty
 php:
     # We only run the highest and lowest supported versions to reduce the load on travis-ci.org.
     - 7.3
-    - 7.1
+    - 7.1.30 # Make this sticky because current default version (7.1.11) has a bug with redis-extension output (MDL-66062)
 
 addons:
   postgresql: "9.6"