diff --git a/pom.xml b/pom.xml
index 09b1760..3f3073e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -79,20 +79,20 @@
     <dependency>
         <groupId>org.apache.tomcat</groupId>
         <artifactId>tomcat-catalina</artifactId>
-        <version>9.0.20</version>
+        <version>9.0.107</version>
     </dependency>
 
     <!-- for LDAP reference server -->
     <dependency>
         <groupId>com.unboundid</groupId>
         <artifactId>unboundid-ldapsdk</artifactId>
-        <version>3.1.1</version>
+        <version>4.0.5</version>
     </dependency>
 
     <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>fastjson</artifactId>
-        <version>1.2.24</version>
+        <version>1.2.83</version>
     </dependency>
 
     <dependency>
@@ -124,19 +124,19 @@
     <dependency>
         <groupId>xalan</groupId>
         <artifactId>xalan</artifactId>
-        <version>2.7.2</version>
+        <version>2.7.3</version>
     </dependency>
 
     <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-beans</artifactId>
-        <version>4.3.7.RELEASE</version>
+        <version>5.2.22.RELEASE</version>
     </dependency>
 
     <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-context</artifactId>
-        <version>4.3.7.RELEASE</version>
+        <version>6.1.20</version>
     </dependency>
 
     <dependency>