diff --git a/easy-rules-core/src/main/java/org/jeasy/rules/core/RuleProxy.java b/easy-rules-core/src/main/java/org/jeasy/rules/core/RuleProxy.java
index 399ef8ff..e71264bf 100644
--- a/easy-rules-core/src/main/java/org/jeasy/rules/core/RuleProxy.java
+++ b/easy-rules-core/src/main/java/org/jeasy/rules/core/RuleProxy.java
@@ -42,7 +42,7 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.Set;
-import java.util.TreeSet;
+import java.util.concurrent.ConcurrentSkipListSet;
 
 import static java.lang.String.format;
 
@@ -278,7 +278,7 @@ private Method getConditionMethod() {
 
     private Set<ActionMethodOrderBean> getActionMethodBeans() {
         if (this.actionMethods == null) {
-            this.actionMethods = new TreeSet<>();
+            this.actionMethods = new ConcurrentSkipListSet<>();
             Method[] methods = getMethods();
             for (Method method : methods) {
                 if (method.isAnnotationPresent(Action.class)) {