diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/mybatis/FlexConfiguration.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/mybatis/FlexConfiguration.java
index c364091d..8727d865 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/mybatis/FlexConfiguration.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/mybatis/FlexConfiguration.java
@@ -53,7 +53,7 @@ import java.util.concurrent.ConcurrentHashMap;
 
 public class FlexConfiguration extends Configuration {
 
-    private static Map<String, MappedStatement> dynamicMappedStatementCache = new ConcurrentHashMap<>();
+    private static final Map<String, MappedStatement> dynamicMappedStatementCache = new ConcurrentHashMap<>();
 
     public FlexConfiguration(Environment environment) {
         super(environment);
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
index 4aafe2db..ceae089d 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java
@@ -28,6 +28,7 @@ import java.util.function.Predicate;
  * @author michael
  * @date 17/3/21
  */
+@SuppressWarnings("unchecked")
 public class ClassUtil {
 
     private ClassUtil() {
diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ConvertUtil.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ConvertUtil.java
index 0bea9d08..47d15cc9 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ConvertUtil.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ConvertUtil.java
@@ -28,11 +28,12 @@ public class ConvertUtil {
     private ConvertUtil() {
     }
 
+    @SuppressWarnings("rawtypes")
     public static Object convert(Object value, Class targetClass) {
         return convert(value, targetClass, false);
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings({"unchecked", "rawtypes"})
     public static Object convert(Object value, Class targetClass, boolean ignoreConvertError) {
         if (value == null && targetClass.isPrimitive()) {
             return getPrimitiveDefaultValue(targetClass);