diff --git a/.travis.yml b/.travis.yml
index 6e001d760..0b7223c75 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: php
 php:
     - 7.1
     - 7.2
+    - 7.3
 
 before_install:
     # turn off XDebug
diff --git a/readme.md b/readme.md
index c521d1cdd..54faf5ff8 100644
--- a/readme.md
+++ b/readme.md
@@ -38,4 +38,4 @@ The recommended way to install is via Composer:
 composer require nette/utils
 ```
 
-It requires PHP version 5.6 and supports PHP up to 7.2. The dev-master version requires PHP 7.1.
+It requires PHP version 5.6 and supports PHP up to 7.3. The dev-master version requires PHP 7.1.