diff --git a/src/Contracts/Types/Address.php b/src/Contracts/Types/Address.php
index 3559e04..d366ad7 100644
--- a/src/Contracts/Types/Address.php
+++ b/src/Contracts/Types/Address.php
@@ -37,7 +37,7 @@ class Address extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/address(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^address(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/Boolean.php b/src/Contracts/Types/Boolean.php
index 3850761..9f8e394 100644
--- a/src/Contracts/Types/Boolean.php
+++ b/src/Contracts/Types/Boolean.php
@@ -35,7 +35,7 @@ class Boolean extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/bool(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^bool(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/Bytes.php b/src/Contracts/Types/Bytes.php
index 55b13fc..29e7fad 100644
--- a/src/Contracts/Types/Bytes.php
+++ b/src/Contracts/Types/Bytes.php
@@ -36,7 +36,7 @@ class Bytes extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/bytes([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^bytes([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/DynamicBytes.php b/src/Contracts/Types/DynamicBytes.php
index a0c8842..e662a52 100644
--- a/src/Contracts/Types/DynamicBytes.php
+++ b/src/Contracts/Types/DynamicBytes.php
@@ -36,7 +36,7 @@ class DynamicBytes extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/bytes(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^bytes(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/Integer.php b/src/Contracts/Types/Integer.php
index 2db4716..8c12774 100644
--- a/src/Contracts/Types/Integer.php
+++ b/src/Contracts/Types/Integer.php
@@ -37,7 +37,7 @@ class Integer extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/int([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^int([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/Str.php b/src/Contracts/Types/Str.php
index 344f070..e68f076 100644
--- a/src/Contracts/Types/Str.php
+++ b/src/Contracts/Types/Str.php
@@ -37,7 +37,7 @@ class Str extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/string(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^string(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**
diff --git a/src/Contracts/Types/Uinteger.php b/src/Contracts/Types/Uinteger.php
index d5f8c2a..c5bbfbb 100644
--- a/src/Contracts/Types/Uinteger.php
+++ b/src/Contracts/Types/Uinteger.php
@@ -37,7 +37,7 @@ class Uinteger extends SolidityType implements IType
      */
     public function isType($name)
     {
-        return (preg_match('/uint([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
+        return (preg_match('/^uint([0-9]{1,})?(\[([0-9]*)\])*/', $name) === 1);
     }
 
     /**