diff --git a/pom.xml b/pom.xml
index 3a58532..768fa9f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,7 +1,6 @@
 <?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">
+    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>
@@ -18,6 +17,7 @@
         <guava.version>32.0.1-jre</guava.version>
         <google-jsr305.version>3.0.2</google-jsr305.version>
         <joda-time.version>2.12.5</joda-time.version>
+        <jbcrypt.version>0.4</jbcrypt.version>
     </properties>
 
     <dependencies>
@@ -52,6 +52,14 @@
             <optional>true</optional>
         </dependency>
 
+        <dependency>
+            <groupId>org.mindrot</groupId>
+            <artifactId>jbcrypt</artifactId>
+            <version>${jbcrypt.version}</version>
+        </dependency>
+
+        <!-- test use only -->
+
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>