diff --git a/README.md b/README.md
index f94c1f5..c36c2be 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ verify($user->getRoles())->notEmpty();
 * stringNotContainsString
 * stringContainsStringIgnoringCase
 * stringNotContainsStringIgnoringCase
-* array
+* isArray
 * bool
 * float
 * int
@@ -55,7 +55,7 @@ verify($user->getRoles())->notEmpty();
 * resource
 * string
 * scalar
-* callable
+* isCallable
 * notArray
 * notBool
 * notFloat
diff --git a/composer.json b/composer.json
index 36350cb..1b487d9 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "php": ">= 7.0",
+        "php": "5.6.*",
         "phpunit/phpunit": "5.7.*",
         "codeception/phpunit-wrapper": ">6.0.16 <6.1.0"
     },
diff --git a/src/Codeception/Verify.php b/src/Codeception/Verify.php
index 22eae88..aedb676 100644
--- a/src/Codeception/Verify.php
+++ b/src/Codeception/Verify.php
@@ -325,7 +325,7 @@ public function stringNotContainsStringIgnoringCase($needle)
         a::assertStringNotContainsStringIgnoringCase($needle, $this->actual, $this->description);
     }
 
-    public function array()
+    public function isArray()
     {
         a::assertIsArray($this->actual, $this->description);
     }
@@ -370,7 +370,7 @@ public function scalar()
         a::assertIsScalar($this->actual, $this->description);
     }
 
-    public function callable()
+    public function isCallable()
     {
         a::assertIsCallable($this->actual, $this->description);
     }
diff --git a/tests/VerifyTest.php b/tests/VerifyTest.php
index 6516cb0..9ba636a 100644
--- a/tests/VerifyTest.php
+++ b/tests/VerifyTest.php
@@ -240,7 +240,7 @@ public function testIsString()
 
     public function testIsArray()
     {
-        verify([1,2,3])->array();
+        verify([1,2,3])->isArray();
         verify(false)->notArray();
     }
 
@@ -288,7 +288,7 @@ public function testIsScalar()
 
     public function testIsCallable()
     {
-        verify(function() {})->callable();
+        verify(function() {})->isCallable();
         verify(false)->notCallable();
     }