diff --git a/libraries-6/pom.xml b/libraries-6/pom.xml
index 9fa44d3a32..f073ca424c 100644
--- a/libraries-6/pom.xml
+++ b/libraries-6/pom.xml
@@ -197,7 +197,7 @@
         <javapoet.version>1.10.0</javapoet.version>
         <mockftpserver.version>2.7.1</mockftpserver.version>
         <functionaljava.version>4.8.1</functionaljava.version>
-        <resilience4j.version>0.12.1</resilience4j.version>
+        <resilience4j.version>2.1.0</resilience4j.version>
         <protonpack.version>1.15</protonpack.version>
         <commons-net.version>3.6</commons-net.version>
         <renjin.version>3.5-beta72</renjin.version>
diff --git a/libraries-6/src/test/java/com/baeldung/resilence4j/Resilience4jUnitTest.java b/libraries-6/src/test/java/com/baeldung/resilence4j/Resilience4jUnitTest.java
index 1d69d20bc2..ab4d9dde40 100644
--- a/libraries-6/src/test/java/com/baeldung/resilence4j/Resilience4jUnitTest.java
+++ b/libraries-6/src/test/java/com/baeldung/resilence4j/Resilience4jUnitTest.java
@@ -43,7 +43,7 @@ public class Resilience4jUnitTest {
                                                           // Percentage of failures to start short-circuit
                                                           .failureRateThreshold(20)
                                                           // Min number of call attempts
-                                                          .ringBufferSizeInClosedState(5)
+                                                          .slidingWindowSize(5)
                                                           .build();
         CircuitBreakerRegistry registry = CircuitBreakerRegistry.of(config);
         CircuitBreaker circuitBreaker = registry.circuitBreaker("my");
@@ -70,7 +70,7 @@ public class Resilience4jUnitTest {
 
         Future<?> taskInProgress = callAndBlock(decorated);
         try {
-            assertThat(bulkhead.isCallPermitted()).isFalse();
+            assertThat(bulkhead.tryAcquirePermission()).isFalse();
         } finally {
             taskInProgress.cancel(true);
         }
diff --git a/spring-web-modules/spring-rest-http-2/pom.xml b/spring-web-modules/spring-rest-http-2/pom.xml
index bcacdbbdb1..c6c8cd2010 100644
--- a/spring-web-modules/spring-rest-http-2/pom.xml
+++ b/spring-web-modules/spring-rest-http-2/pom.xml
@@ -51,7 +51,7 @@
 
     <properties>
         <swagger2.version>2.9.2</swagger2.version>
-        <resilience4j.version>1.6.1</resilience4j.version>
+        <resilience4j.version>2.1.0</resilience4j.version>
         <springdoc.version>1.7.0</springdoc.version>
     </properties>