diff --git a/pom.xml b/pom.xml
index 8c9f4fd..5b572d2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>xyz.zhouxy.plusone</groupId>
@@ -15,6 +15,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
+    <commons-lang3.version>3.12.0</commons-lang3.version>
   </properties>
 
   <dependencies>
@@ -22,17 +23,35 @@
       <groupId>xyz.zhouxy.plusone</groupId>
       <artifactId>plusone-commons</artifactId>
       <version>0.1.0-SNAPSHOT</version>
+      <exclusions>
+        <exclusion>
+          <groupId>cn.hutool</groupId>
+          <artifactId>hutool-core</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>${commons-lang3.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <version>5.9.2</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>cn.hutool</groupId>
+      <artifactId>hutool-core</artifactId>
+      <version>5.8.12</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
 
   <build>
-    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+    <!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+    <pluginManagement>
       <plugins>
         <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
         <plugin>
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
index 7e02756..b424c46 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
@@ -4,7 +4,8 @@ import java.util.List;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-import cn.hutool.core.util.StrUtil;
+import org.apache.commons.lang3.StringUtils;
+
 import xyz.zhouxy.plusone.constant.RegexConsts;
 import xyz.zhouxy.plusone.util.RegexUtil;
 
@@ -108,7 +109,7 @@ public class StringValidator<DTO> extends PropertyValidator<DTO, String, StringV
 
     public <E extends RuntimeException> StringValidator<DTO> notBlank(
             Function<String, E> exceptionCreator) {
-        withRule(input -> StrUtil.isNotBlank(input), exceptionCreator);
+        withRule(StringUtils::isNotBlank, exceptionCreator);
         return this;
     }
 
diff --git a/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java b/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
index d9ffe81..92082c0 100644
--- a/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
+++ b/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
@@ -4,15 +4,15 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Objects;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import xyz.zhouxy.plusone.constant.RegexConsts;
 import xyz.zhouxy.plusone.validator.BaseValidator;
 import xyz.zhouxy.plusone.validator.ValidateUtil;
 
-public class BaseValidatorTest {
+class BaseValidatorTest {
     @Test
-    public void testValidate() {
+    void testValidate() {
         RegisterCommand registerCommand = new RegisterCommand("zhouxy108", "luquanlion@outlook.com", "22336", "A1b2C3d4",
                 "A1b2C3d4",
                 Arrays.asList(new String[] { "admin", "editor" }));