diff --git a/src/CompositeSpecification.php b/src/CompositeSpecification.php
index 4d10465..8d2afac 100644
--- a/src/CompositeSpecification.php
+++ b/src/CompositeSpecification.php
@@ -5,11 +5,10 @@
 /**
  * @package Rb\Specification
  */
-abstract class CompositeSpecification implements SpecificationInterface
+abstract class CompositeSpecification implements CompositeSpecificationInterface
 {
     /**
-     * @param  SpecificationInterface $specification
-     * @return AndX
+     * {@inheritDoc}
      */
     public function andX(SpecificationInterface $specification)
     {
@@ -17,8 +16,7 @@ public function andX(SpecificationInterface $specification)
     }
 
     /**
-     * @param  SpecificationInterface $specification
-     * @return OrX
+     * {@inheritDoc}
      */
     public function orX(SpecificationInterface $specification)
     {
@@ -26,8 +24,7 @@ public function orX(SpecificationInterface $specification)
     }
 
     /**
-     * @param  SpecificationInterface $specification
-     * @return Not
+     * {@inheritDoc}
      */
     public function not(SpecificationInterface $specification)
     {
diff --git a/src/CompositeSpecificationInterface.php b/src/CompositeSpecificationInterface.php
new file mode 100644
index 0000000..49cd6fd
--- /dev/null
+++ b/src/CompositeSpecificationInterface.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Rb\Specification;
+
+/**
+ * @package Rb\Specification
+ */
+interface CompositeSpecificationInterface extends SpecificationInterface
+{
+    /**
+     * @param  SpecificationInterface $specification
+     * @return AndX
+     */
+    public function andX(SpecificationInterface $specification);
+
+    /**
+     * @param  SpecificationInterface $specification
+     * @return OrX
+     */
+    public function orX(SpecificationInterface $specification);
+
+    /**
+     * @param  SpecificationInterface $specification
+     * @return Not
+     */
+    public function not(SpecificationInterface $specification);
+}
diff --git a/src/SpecificationInterface.php b/src/SpecificationInterface.php
index 900fb72..57645bd 100644
--- a/src/SpecificationInterface.php
+++ b/src/SpecificationInterface.php
@@ -7,24 +7,6 @@
  */
 interface SpecificationInterface
 {
-    /**
-     * @param  SpecificationInterface $specification
-     * @return AndX
-     */
-    public function andX(SpecificationInterface $specification);
-
-    /**
-     * @param  SpecificationInterface $specification
-     * @return OrX
-     */
-    public function orX(SpecificationInterface $specification);
-
-    /**
-     * @param  SpecificationInterface $specification
-     * @return Not
-     */
-    public function not(SpecificationInterface $specification);
-
     /**
      * Returns a boolean indicating whether or not this specification can support the given class
      * @param  mixed $value