diff --git a/.travis.yml b/.travis.yml
index a3fd73f..2e8e74d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ php:
   - '7.1'
   - '7.2'
   - '7.3'
+  - '7.4'
 
 # as this is a php project, node.js (for JS unit testing) isn't installed
 install: