diff --git a/.travis.yml b/.travis.yml
index a1852ef..fa5db4b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,8 @@ language: php
 sudo: false
 
 php:
-  - 5.5
-  - 5.6
-  - 7
+  - 7.0
+  - 7.1
 
 env:
 
diff --git a/composer.json b/composer.json
index 8c55e25..e384301 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
   ],
   "require": { "php": ">=7.0.0" },
   "require-dev": {
-    "phpflo/phpflo": "^2.0.0",
+    "phpflo/phpflo": "^2.1.0",
     "phpunit/phpunit": "^5.0"
   },
   "autoload": {
@@ -28,6 +28,8 @@
   },
   "config": { "bin-dir": "bin" },
   "autoload-dev": {
-    "psr-4": { "Tests\\": "tests/" }
+    "psr-4": {
+      "Tests\\": "tests/"
+    }
   }
 }
diff --git a/tests/PhpFlo/Component/CounterTest.php b/tests/PhpFlo/Component/CounterTest.php
index 4914ee8..6d3620f 100644
--- a/tests/PhpFlo/Component/CounterTest.php
+++ b/tests/PhpFlo/Component/CounterTest.php
@@ -29,7 +29,7 @@ public function testBehavior()
         $this->assertTrue($counter->outPorts()->has('count'));
 
         $counter->appendCount(1);
-        $counter->appendCount(2);
+        $counter->appendCount("2");
         $counter->appendCount(null);
 
         $counter->sendCount();