diff --git a/.travis.yml b/.travis.yml
index 1101524d..235f04b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@ env:
   # Test against the highest supported PHPCS version.
   - PHPCS_BRANCH="dev-master" PHPLINT=1
   # Test against the lowest supported PHPCS version.
-  - PHPCS_BRANCH="3.3.0"
+  - PHPCS_BRANCH="3.3.1"
 
 matrix:
   fast_finish: true
diff --git a/composer.json b/composer.json
index e3bcd627..ccbe3a1c 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
 	},
 	"require": {
 		"php": ">=5.4",
-		"squizlabs/php_codesniffer": "^3.3.0",
+		"squizlabs/php_codesniffer": "^3.3.1",
 		"wp-coding-standards/wpcs": "^1.0.0",
 		"phpcompatibility/phpcompatibility-wp": "^1.0.0",
 		"phpmd/phpmd": "^2.2.3"