diff --git a/.phpunit.result.cache b/.phpunit.result.cache
new file mode 100644
index 0000000..e992650
--- /dev/null
+++ b/.phpunit.result.cache
@@ -0,0 +1 @@
+{"version":1,"defects":{"Affinity4\\Template\\Tests\\TokenizerTest::testAddRuleAndGetRules":6},"times":{"Affinity4\\Template\\Tests\\EngineTest::testSetStreamAndGetStream":0.008,"Affinity4\\Template\\Tests\\EngineTest::testCompile":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderVariables":0.002,"Affinity4\\Template\\Tests\\EngineTest::testRenderIfStatements":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderEachLoop":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderForeachLoop":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderForeachLoopWithKeysAndValues":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderForLoop":0.001,"Affinity4\\Template\\Tests\\EngineTest::testRenderWhileLoop":0.001,"Affinity4\\Template\\Tests\\EngineTest::testSetViewPathAndGetViewPath":0.001,"Affinity4\\Template\\Tests\\EngineTest::testSetLayoutAndGetLayout":0.001,"Affinity4\\Template\\Tests\\EngineTest::testAddBlocks":0.001,"Affinity4\\Template\\Tests\\EngineTest::testCompileBlocks":0.001,"Affinity4\\Template\\Tests\\EngineTest::testThrowsTemplateNotFoundException":0.001,"Affinity4\\Template\\Tests\\TokenizerTest::testAddRuleAndGetRules":0.001}}
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 963edb1..a636ee0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: php
 php:
-  - '7.0'
-  - '7.1'
+  - '7.4'
+  - '8.0'
+  - '8.1'
 
 before_script: composer install
 script: vendor/bin/phpunit
diff --git a/composer.json b/composer.json
index 6ad7fe1..1447701 100644
--- a/composer.json
+++ b/composer.json
@@ -14,10 +14,10 @@
         }
     },
     "require": {
-        "php": ">=7.0",
-        "mikey179/vfsStream": "^1.6"
+        "php": ">=7.4",
+        "mikey179/vfsstream": "^1.6"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.1"
+        "phpunit/phpunit": "^8.0"
     }
 }
diff --git a/tests/EngineTest.php b/tests/EngineTest.php
index eefe131..7b78534 100644
--- a/tests/EngineTest.php
+++ b/tests/EngineTest.php
@@ -21,7 +21,7 @@ class EngineTest extends TestCase
     private $template;
     private $view_path;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->vfs = vfsStream::setup('tests');
         $this->template = new Engine(new Affinity());
diff --git a/tests/TokenizerTest.php b/tests/TokenizerTest.php
index d0342bb..2d05aea 100644
--- a/tests/TokenizerTest.php
+++ b/tests/TokenizerTest.php
@@ -17,7 +17,7 @@ class TokenizerTest extends TestCase
 {
     private $tokenizer;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->tokenizer = new Tokenizer;
     }