diff --git a/src/main/java/org/redisson/core/RLock.java b/src/main/java/org/redisson/core/RLock.java
index 65b053949..c4a725ed8 100644
--- a/src/main/java/org/redisson/core/RLock.java
+++ b/src/main/java/org/redisson/core/RLock.java
@@ -27,8 +27,8 @@ import java.util.concurrent.locks.Lock;
  *
  */
 
-public interface RLock extends Lock, RObject {
-    
+public interface RLock extends Lock, RExpirable {
+
     /**
      * Acquires the lock.
      *
@@ -36,27 +36,27 @@ public interface RLock extends Lock, RObject {
      * disabled for thread scheduling purposes and lies dormant until the
      * lock has been acquired.
      *
-     * If the lock is acquired, it is held until <code>unlock</code> is invoked, 
-     * or until leaseTime have passed 
+     * If the lock is acquired, it is held until <code>unlock</code> is invoked,
+     * or until leaseTime have passed
      * since the lock was granted - whichever comes first.
-     * 
-     * @param leaseTime the maximum time to hold the lock after granting it, 
+     *
+     * @param leaseTime the maximum time to hold the lock after granting it,
      *        before automatically releasing it if it hasn't already been released by invoking <code>unlock</code>.
-     *        If leaseTime is -1, hold the lock until explicitly unlocked.  
+     *        If leaseTime is -1, hold the lock until explicitly unlocked.
      * @param unit the time unit of the {@code leaseTime} argument
-     * @throws InterruptedException - if the thread is interrupted before or during this method. 
+     * @throws InterruptedException - if the thread is interrupted before or during this method.
      */
     void lockInterruptibly(long leaseTime, TimeUnit unit) throws InterruptedException;
 
     /**
-     * Returns <code>true</code> as soon as the lock is acquired. 
-     * If the lock is currently held by another thread in this or any 
-     * other process in the distributed system this method keeps trying 
-     * to acquire the lock for up to <code>waitTime</code> before 
-     * giving up and returning <code>false</code>. If the lock is acquired, 
-     * it is held until <code>unlock</code> is invoked, or until <code>leaseTime</code> 
+     * Returns <code>true</code> as soon as the lock is acquired.
+     * If the lock is currently held by another thread in this or any
+     * other process in the distributed system this method keeps trying
+     * to acquire the lock for up to <code>waitTime</code> before
+     * giving up and returning <code>false</code>. If the lock is acquired,
+     * it is held until <code>unlock</code> is invoked, or until <code>leaseTime</code>
      * have passed since the lock was granted - whichever comes first.
-     * 
+     *
      * @param waitTime the maximum time to aquire the lock
      * @param leaseTime
      * @param unit
@@ -64,7 +64,7 @@ public interface RLock extends Lock, RObject {
      * @throws InterruptedException
      */
     boolean tryLock(long waitTime, long leaseTime, TimeUnit unit) throws InterruptedException;
-    
+
     /**
      * Acquires the lock.
      *
@@ -72,18 +72,18 @@ public interface RLock extends Lock, RObject {
      * disabled for thread scheduling purposes and lies dormant until the
      * lock has been acquired.
      *
-     * If the lock is acquired, it is held until <code>unlock</code> is invoked, 
-     * or until leaseTime milliseconds have passed 
+     * If the lock is acquired, it is held until <code>unlock</code> is invoked,
+     * or until leaseTime milliseconds have passed
      * since the lock was granted - whichever comes first.
-     * 
-     * @param leaseTime the maximum time to hold the lock after granting it, 
+     *
+     * @param leaseTime the maximum time to hold the lock after granting it,
      *        before automatically releasing it if it hasn't already been released by invoking <code>unlock</code>.
-     *        If leaseTime is -1, hold the lock until explicitly unlocked.  
+     *        If leaseTime is -1, hold the lock until explicitly unlocked.
      * @param unit the time unit of the {@code leaseTime} argument
-     * 
+     *
      */
     void lock(long leaseTime, TimeUnit unit);
-    
+
     /**
      * Unlocks lock independently of state
      *