diff --git a/README.md b/README.md
index 7d56bb6..0c11746 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ For any question, you can use [StackOverflow](https://stackoverflow.com/question
 * [cemo](https://github.com/cemo)
 * [dagframstad](https://github.com/dagframstad)
 * [danrivcap](https://github.com/danrivcap)
+* [Desislav-Petrov](https://github.com/Desislav-Petrov)
 * [drem-darios](https://github.com/drem-darios)
 * [gs-spadmanabhan](https://github.com/gs-spadmanabhan)
 * [JurMarky](https://github.com/JurMarky)
diff --git a/easy-rules-core/src/main/java/org/jeasy/rules/api/Rules.java b/easy-rules-core/src/main/java/org/jeasy/rules/api/Rules.java
index fd23686..6761c3c 100644
--- a/easy-rules-core/src/main/java/org/jeasy/rules/api/Rules.java
+++ b/easy-rules-core/src/main/java/org/jeasy/rules/api/Rules.java
@@ -120,11 +120,11 @@ public class Rules implements Iterable<Rule> {
     }
 
     /**
-     * Check how many rules are currently registered
+     * Return how many rules are currently registered.
      *
      * @return the number of rules currently registered
      */
-    public int rulesCount() {
+    public int size() {
         return rules.size();
     }
 
diff --git a/easy-rules-core/src/test/java/org/jeasy/rules/api/RulesTest.java b/easy-rules-core/src/test/java/org/jeasy/rules/api/RulesTest.java
index d97b10f..0571c0a 100644
--- a/easy-rules-core/src/test/java/org/jeasy/rules/api/RulesTest.java
+++ b/easy-rules-core/src/test/java/org/jeasy/rules/api/RulesTest.java
@@ -119,14 +119,14 @@ public class RulesTest {
     }
 
     @Test
-    public void rulesCount() {
-        assertThat(rules.rulesCount()).isEqualTo(0);
+    public void size() {
+        assertThat(rules.size()).isEqualTo(0);
 
         rules.register(new DummyRule());
-        assertThat(rules.rulesCount()).isEqualTo(1);
+        assertThat(rules.size()).isEqualTo(1);
 
         rules.unregister(new DummyRule());
-        assertThat(rules.rulesCount()).isEqualTo(0);
+        assertThat(rules.size()).isEqualTo(0);
     }
 
     @Test(expected = NullPointerException.class)