diff --git a/cffu-ttl-executor-wrapper/src/main/java/io/foldright/cffu/ttl/CffuTtlExecutorWrapperProvider.java b/cffu-ttl-executor-wrapper/src/main/java/io/foldright/cffu/ttl/CffuTtlExecutorWrapperProvider.java
index 23b05511..a2110e54 100644
--- a/cffu-ttl-executor-wrapper/src/main/java/io/foldright/cffu/ttl/CffuTtlExecutorWrapperProvider.java
+++ b/cffu-ttl-executor-wrapper/src/main/java/io/foldright/cffu/ttl/CffuTtlExecutorWrapperProvider.java
@@ -2,6 +2,7 @@
 
 import com.alibaba.ttl.threadpool.TtlExecutors;
 import edu.umd.cs.findbugs.annotations.NonNull;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import io.foldright.cffu.spi.ExecutorWrapperProvider;
 
 import java.util.concurrent.Executor;
@@ -20,6 +21,7 @@ public class CffuTtlExecutorWrapperProvider implements ExecutorWrapperProvider {
      */
     @NonNull
     @Override
+    @SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
     public Executor wrap(@NonNull Executor executor) {
         return TtlExecutors.getTtlExecutor(requireNonNull(executor, "executor is null"));
     }
diff --git a/pom.xml b/pom.xml
index 1a532ec4..1bb7e627 100644
--- a/pom.xml
+++ b/pom.xml
@@ -458,7 +458,7 @@
 				<plugin>
 					<groupId>com.github.spotbugs</groupId>
 					<artifactId>spotbugs-maven-plugin</artifactId>
-					<version>4.8.3.1</version>
+					<version>4.8.4.0</version>
 				</plugin>
 				<plugin>
 					<groupId>org.jacoco</groupId>
@@ -544,6 +544,9 @@
 										<!-- https://www.mojohaus.org/extra-enforcer-rules/enforceBytecodeVersion.html -->
 										<enforceBytecodeVersion>
 											<maxJdkVersion>${maven.compiler.source}</maxJdkVersion>
+											<excludes>
+												<exclude>io.foldright:cffu*</exclude>
+											</excludes>
 										</enforceBytecodeVersion>
 									</rules>
 								</configuration>
@@ -553,7 +556,7 @@
 							<dependency>
 								<groupId>org.codehaus.mojo</groupId>
 								<artifactId>extra-enforcer-rules</artifactId>
-								<version>1.7.0</version>
+								<version>1.8.0</version>
 							</dependency>
 						</dependencies>
 					</plugin>