diff --git a/.travis.yml b/.travis.yml
index 70c727f..a90ad29 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ sudo: false
 php:
   - 7.1
   - 7.2
+  - 7.3
   - nightly
 
 env:
diff --git a/composer.json b/composer.json
index 223a614..2b8ddf2 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
 	],
 	"require": {
 		"php": "~7.1",
-		"squizlabs/php_codesniffer": "~3.3.0",
+		"squizlabs/php_codesniffer": "~3.3.1",
 		"slevomat/coding-standard": "~4.7"
 	},
 	"require-dev": {