diff --git a/src/main/java/org/springframework/classify/SubclassClassifier.java b/src/main/java/org/springframework/classify/SubclassClassifier.java
index 9428983..373e8cd 100644
--- a/src/main/java/org/springframework/classify/SubclassClassifier.java
+++ b/src/main/java/org/springframework/classify/SubclassClassifier.java
@@ -132,6 +132,7 @@ public class SubclassClassifier<T, C> implements Classifier<T, C> {
 	 * @author Dave Syer
 	 * 
 	 */
+	@SuppressWarnings("serial")
 	private static class ClassComparator implements Comparator<Class<?>>, Serializable {
 		/**
 		 * @return 1 if arg0 is assignable from arg1, -1 otherwise
diff --git a/src/main/java/org/springframework/retry/ExhaustedRetryException.java b/src/main/java/org/springframework/retry/ExhaustedRetryException.java
index dc2f507..62062d3 100644
--- a/src/main/java/org/springframework/retry/ExhaustedRetryException.java
+++ b/src/main/java/org/springframework/retry/ExhaustedRetryException.java
@@ -16,6 +16,7 @@
 
 package org.springframework.retry;
 
+@SuppressWarnings("serial")
 public class ExhaustedRetryException extends RetryException {
 
 	public ExhaustedRetryException(String msg, Throwable cause) {
diff --git a/src/main/java/org/springframework/retry/RetryException.java b/src/main/java/org/springframework/retry/RetryException.java
index 2ff3a3f..ba386b2 100644
--- a/src/main/java/org/springframework/retry/RetryException.java
+++ b/src/main/java/org/springframework/retry/RetryException.java
@@ -18,6 +18,7 @@ package org.springframework.retry;
 
 import org.springframework.core.NestedRuntimeException;
 
+@SuppressWarnings("serial")
 public class RetryException extends NestedRuntimeException {
 
 	public RetryException(String msg, Throwable cause) {
diff --git a/src/main/java/org/springframework/retry/TerminatedRetryException.java b/src/main/java/org/springframework/retry/TerminatedRetryException.java
index 4e8680b..f8010d8 100644
--- a/src/main/java/org/springframework/retry/TerminatedRetryException.java
+++ b/src/main/java/org/springframework/retry/TerminatedRetryException.java
@@ -16,6 +16,7 @@
 
 package org.springframework.retry;
 
+@SuppressWarnings("serial")
 public class TerminatedRetryException extends RetryException {
 
 	public TerminatedRetryException(String msg, Throwable cause) {
diff --git a/src/main/java/org/springframework/retry/backoff/BackOffInterruptedException.java b/src/main/java/org/springframework/retry/backoff/BackOffInterruptedException.java
index acc639b..1723b76 100644
--- a/src/main/java/org/springframework/retry/backoff/BackOffInterruptedException.java
+++ b/src/main/java/org/springframework/retry/backoff/BackOffInterruptedException.java
@@ -26,6 +26,7 @@ import org.springframework.retry.RetryException;
  * @author Rob Harrop
  * @since 2.1
  */
+@SuppressWarnings("serial")
 public class BackOffInterruptedException extends RetryException {
 
 	public BackOffInterruptedException(String msg) {
diff --git a/src/main/java/org/springframework/retry/context/RetryContextSupport.java b/src/main/java/org/springframework/retry/context/RetryContextSupport.java
index 8aa295a..3adc46a 100644
--- a/src/main/java/org/springframework/retry/context/RetryContextSupport.java
+++ b/src/main/java/org/springframework/retry/context/RetryContextSupport.java
@@ -20,6 +20,7 @@ import org.springframework.core.AttributeAccessorSupport;
 import org.springframework.retry.RetryContext;
 import org.springframework.retry.RetryPolicy;
 
+@SuppressWarnings("serial")
 public class RetryContextSupport extends AttributeAccessorSupport implements RetryContext {
 
 	private boolean terminate = false;
diff --git a/src/main/java/org/springframework/retry/policy/CompositeRetryPolicy.java b/src/main/java/org/springframework/retry/policy/CompositeRetryPolicy.java
index 6b1242f..294944f 100644
--- a/src/main/java/org/springframework/retry/policy/CompositeRetryPolicy.java
+++ b/src/main/java/org/springframework/retry/policy/CompositeRetryPolicy.java
@@ -117,6 +117,7 @@ public class CompositeRetryPolicy implements RetryPolicy {
 		((RetryContextSupport) context).registerThrowable(throwable);
 	}
 
+	@SuppressWarnings("serial")
 	private class CompositeRetryContext extends RetryContextSupport {
 		RetryContext[] contexts;
 
diff --git a/src/main/java/org/springframework/retry/policy/ExceptionClassifierRetryPolicy.java b/src/main/java/org/springframework/retry/policy/ExceptionClassifierRetryPolicy.java
index e94e6dd..c7ef498 100644
--- a/src/main/java/org/springframework/retry/policy/ExceptionClassifierRetryPolicy.java
+++ b/src/main/java/org/springframework/retry/policy/ExceptionClassifierRetryPolicy.java
@@ -105,6 +105,7 @@ public class ExceptionClassifierRetryPolicy implements RetryPolicy {
 		((RetryContextSupport) context).registerThrowable(throwable);
 	}
 
+	@SuppressWarnings("serial")
 	private static class ExceptionClassifierRetryContext extends RetryContextSupport implements RetryPolicy {
 
 		final private Classifier<Throwable, RetryPolicy> exceptionClassifier;
diff --git a/src/main/java/org/springframework/retry/policy/NeverRetryPolicy.java b/src/main/java/org/springframework/retry/policy/NeverRetryPolicy.java
index 5844551..b48ed9c 100644
--- a/src/main/java/org/springframework/retry/policy/NeverRetryPolicy.java
+++ b/src/main/java/org/springframework/retry/policy/NeverRetryPolicy.java
@@ -80,6 +80,7 @@ public class NeverRetryPolicy implements RetryPolicy {
 	 * @author Dave Syer
 	 * 
 	 */
+	@SuppressWarnings("serial")
 	private static class NeverRetryContext extends RetryContextSupport {
 		private boolean finished = false;
 
diff --git a/src/main/java/org/springframework/retry/policy/RetryCacheCapacityExceededException.java b/src/main/java/org/springframework/retry/policy/RetryCacheCapacityExceededException.java
index 2860800..5771cfa 100644
--- a/src/main/java/org/springframework/retry/policy/RetryCacheCapacityExceededException.java
+++ b/src/main/java/org/springframework/retry/policy/RetryCacheCapacityExceededException.java
@@ -28,6 +28,7 @@ import org.springframework.retry.RetryException;
  * @author Dave Syer
  * 
  */
+@SuppressWarnings("serial")
 public class RetryCacheCapacityExceededException extends RetryException {
 
 	/**
diff --git a/src/main/java/org/springframework/retry/policy/SimpleRetryPolicy.java b/src/main/java/org/springframework/retry/policy/SimpleRetryPolicy.java
index 7ccf6cc..52ef10d 100644
--- a/src/main/java/org/springframework/retry/policy/SimpleRetryPolicy.java
+++ b/src/main/java/org/springframework/retry/policy/SimpleRetryPolicy.java
@@ -133,6 +133,7 @@ public class SimpleRetryPolicy implements RetryPolicy {
 		return new SimpleRetryContext(parent);
 	}
 
+	@SuppressWarnings("serial")
 	private static class SimpleRetryContext extends RetryContextSupport {
 		public SimpleRetryContext(RetryContext parent) {
 			super(parent);
diff --git a/src/main/java/org/springframework/retry/policy/TimeoutRetryPolicy.java b/src/main/java/org/springframework/retry/policy/TimeoutRetryPolicy.java
index 3129895..4599597 100644
--- a/src/main/java/org/springframework/retry/policy/TimeoutRetryPolicy.java
+++ b/src/main/java/org/springframework/retry/policy/TimeoutRetryPolicy.java
@@ -75,6 +75,7 @@ public class TimeoutRetryPolicy implements RetryPolicy {
 		// otherwise no-op - we only time out, otherwise retry everything...
 	}
 
+	@SuppressWarnings("serial")
 	private static class TimeoutRetryContext extends RetryContextSupport {
 		private long timeout;
 
diff --git a/src/test/java/org/springframework/classify/SubclassExceptionClassifierTests.java b/src/test/java/org/springframework/classify/SubclassExceptionClassifierTests.java
index 4982937..8afc992 100644
--- a/src/test/java/org/springframework/classify/SubclassExceptionClassifierTests.java
+++ b/src/test/java/org/springframework/classify/SubclassExceptionClassifierTests.java
@@ -71,6 +71,7 @@ public class SubclassExceptionClassifierTests {
 		assertEquals(classifier.getDefault(), classifier.classify(new RuntimeException("Foo")));
 	}
 
+	@SuppressWarnings("serial")
 	@Test
 	public void testClassifyAncestorMatch() {
 		classifier.setTypeMap(new HashMap<Class<? extends Throwable>, String>() {
diff --git a/src/test/java/org/springframework/retry/ResourcelessTransactionManager.java b/src/test/java/org/springframework/retry/ResourcelessTransactionManager.java
index ae50754..88949c3 100644
--- a/src/test/java/org/springframework/retry/ResourcelessTransactionManager.java
+++ b/src/test/java/org/springframework/retry/ResourcelessTransactionManager.java
@@ -8,6 +8,7 @@ import org.springframework.transaction.support.AbstractPlatformTransactionManage
 import org.springframework.transaction.support.DefaultTransactionStatus;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
 
+@SuppressWarnings("serial")
 public class ResourcelessTransactionManager extends AbstractPlatformTransactionManager {
 
 	protected void doBegin(Object transaction, TransactionDefinition definition) throws TransactionException {