diff --git a/README.md b/README.md
index 25498ac..a4a3fcc 100644
--- a/README.md
+++ b/README.md
@@ -429,6 +429,7 @@ public class ExtendedTypeHandler implements BaseExtendedTypeHandler {
 
 ## 9 Roadmap
 
+- 3.1.2：Fixed log4j2 vulnerability introduced by external dependencies
 - 3.1.1：Add object deep copy function to facilitate users to save the objects before change
 - 3.0.1：Optimizing System Naming, represent the difference value with json
 - 3.0.0：Optimizing System Naming
diff --git a/README_CN.md b/README_CN.md
index ce608b6..3ed344b 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -433,6 +433,7 @@ public class ExtendedTypeHandler implements BaseExtendedTypeHandler {
 
 ## 9 Roadmap
 
+- 3.1.2：修复外部依赖引入的log4j2漏洞
 - 3.1.1：增加对象深度拷贝功能，便于用户保存变更前的对象
 - 3.0.1: 优化系统命名，对比值输出转为灵活的json
 - 3.0.0：优化系统命名
diff --git a/client/pom.xml b/client/pom.xml
index 8d496ea..e8d1307 100644
--- a/client/pom.xml
+++ b/client/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerClient</artifactId>
     <packaging>jar</packaging>
diff --git a/client/target/ObjectLoggerClient-3.1.1-javadoc.jar b/client/target/ObjectLoggerClient-3.1.1-javadoc.jar
deleted file mode 100644
index 47646a3..0000000
Binary files a/client/target/ObjectLoggerClient-3.1.1-javadoc.jar and /dev/null differ
diff --git a/client/target/ObjectLoggerClient-3.1.2-javadoc.jar b/client/target/ObjectLoggerClient-3.1.2-javadoc.jar
new file mode 100644
index 0000000..409cb40
Binary files /dev/null and b/client/target/ObjectLoggerClient-3.1.2-javadoc.jar differ
diff --git a/client/target/ObjectLoggerClient-3.1.1-sources.jar b/client/target/ObjectLoggerClient-3.1.2-sources.jar
similarity index 98%
rename from client/target/ObjectLoggerClient-3.1.1-sources.jar
rename to client/target/ObjectLoggerClient-3.1.2-sources.jar
index da9f460..f337a68 100644
Binary files a/client/target/ObjectLoggerClient-3.1.1-sources.jar and b/client/target/ObjectLoggerClient-3.1.2-sources.jar differ
diff --git a/client/target/ObjectLoggerClient-3.1.1.jar b/client/target/ObjectLoggerClient-3.1.2.jar
similarity index 80%
rename from client/target/ObjectLoggerClient-3.1.1.jar
rename to client/target/ObjectLoggerClient-3.1.2.jar
index 61e2648..a03e9ce 100644
Binary files a/client/target/ObjectLoggerClient-3.1.1.jar and b/client/target/ObjectLoggerClient-3.1.2.jar differ
diff --git a/client/target/ObjectLoggerClient-3.1.1.pom b/client/target/ObjectLoggerClient-3.1.2.pom
similarity index 97%
rename from client/target/ObjectLoggerClient-3.1.1.pom
rename to client/target/ObjectLoggerClient-3.1.2.pom
index 8d496ea..e8d1307 100644
--- a/client/target/ObjectLoggerClient-3.1.1.pom
+++ b/client/target/ObjectLoggerClient-3.1.2.pom
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerClient</artifactId>
     <packaging>jar</packaging>
diff --git a/demo/pom.xml b/demo/pom.xml
index 7341680..845191a 100644
--- a/demo/pom.xml
+++ b/demo/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerDemo</artifactId>
 
diff --git a/demo/target/ObjectLoggerDemo-3.1.1-javadoc.jar b/demo/target/ObjectLoggerDemo-3.1.1-javadoc.jar
deleted file mode 100644
index 19e36e0..0000000
Binary files a/demo/target/ObjectLoggerDemo-3.1.1-javadoc.jar and /dev/null differ
diff --git a/demo/target/ObjectLoggerDemo-3.1.2-javadoc.jar b/demo/target/ObjectLoggerDemo-3.1.2-javadoc.jar
new file mode 100644
index 0000000..ae92b4f
Binary files /dev/null and b/demo/target/ObjectLoggerDemo-3.1.2-javadoc.jar differ
diff --git a/demo/target/ObjectLoggerDemo-3.1.1-sources.jar b/demo/target/ObjectLoggerDemo-3.1.2-sources.jar
similarity index 62%
rename from demo/target/ObjectLoggerDemo-3.1.1-sources.jar
rename to demo/target/ObjectLoggerDemo-3.1.2-sources.jar
index f84cdee..e4dfd65 100644
Binary files a/demo/target/ObjectLoggerDemo-3.1.1-sources.jar and b/demo/target/ObjectLoggerDemo-3.1.2-sources.jar differ
diff --git a/demo/target/ObjectLoggerDemo-3.1.1.jar b/demo/target/ObjectLoggerDemo-3.1.2.jar
similarity index 98%
rename from demo/target/ObjectLoggerDemo-3.1.1.jar
rename to demo/target/ObjectLoggerDemo-3.1.2.jar
index 15637d3..75156e4 100644
Binary files a/demo/target/ObjectLoggerDemo-3.1.1.jar and b/demo/target/ObjectLoggerDemo-3.1.2.jar differ
diff --git a/demo/target/ObjectLoggerDemo-3.1.1.pom b/demo/target/ObjectLoggerDemo-3.1.2.pom
similarity index 97%
rename from demo/target/ObjectLoggerDemo-3.1.1.pom
rename to demo/target/ObjectLoggerDemo-3.1.2.pom
index 7341680..845191a 100644
--- a/demo/target/ObjectLoggerDemo-3.1.1.pom
+++ b/demo/target/ObjectLoggerDemo-3.1.2.pom
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerDemo</artifactId>
 
diff --git a/pic/ObjectLogger.psd b/pic/ObjectLogger.psd
deleted file mode 100644
index 287b9c2..0000000
Binary files a/pic/ObjectLogger.psd and /dev/null differ
diff --git a/pom.xml b/pom.xml
index 5b750c1..146da0a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.yeecode.objectlogger</groupId>
     <artifactId>ObjectLogger</artifactId>
-    <version>3.1.1</version>
+    <version>3.1.2</version>
     <name>ObjectLogger</name>
 
     <modules>
@@ -82,7 +82,7 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
-                <version>4.5.9</version>
+                <version>4.5.13</version>
             </dependency>
             <dependency>
                 <groupId>com.github.yeecode.objectlogger</groupId>
@@ -154,7 +154,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.6</version>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <phase>verify</phase>
diff --git a/server/pom.xml b/server/pom.xml
index e5559ab..6b779db 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerServer</artifactId>
     <packaging>jar</packaging>
diff --git a/server/target/ObjectLoggerServer-3.1.1-javadoc.jar b/server/target/ObjectLoggerServer-3.1.1-javadoc.jar
deleted file mode 100644
index 8dd52be..0000000
Binary files a/server/target/ObjectLoggerServer-3.1.1-javadoc.jar and /dev/null differ
diff --git a/server/target/ObjectLoggerServer-3.1.2-javadoc.jar b/server/target/ObjectLoggerServer-3.1.2-javadoc.jar
new file mode 100644
index 0000000..cde79ac
Binary files /dev/null and b/server/target/ObjectLoggerServer-3.1.2-javadoc.jar differ
diff --git a/server/target/ObjectLoggerServer-3.1.1-sources.jar b/server/target/ObjectLoggerServer-3.1.2-sources.jar
similarity index 97%
rename from server/target/ObjectLoggerServer-3.1.1-sources.jar
rename to server/target/ObjectLoggerServer-3.1.2-sources.jar
index ef3a408..d773c3b 100644
Binary files a/server/target/ObjectLoggerServer-3.1.1-sources.jar and b/server/target/ObjectLoggerServer-3.1.2-sources.jar differ
diff --git a/server/target/ObjectLoggerServer-3.1.1.jar b/server/target/ObjectLoggerServer-3.1.2.jar
similarity index 98%
rename from server/target/ObjectLoggerServer-3.1.1.jar
rename to server/target/ObjectLoggerServer-3.1.2.jar
index 252670b..814b1ba 100644
Binary files a/server/target/ObjectLoggerServer-3.1.1.jar and b/server/target/ObjectLoggerServer-3.1.2.jar differ
diff --git a/server/target/ObjectLoggerServer-3.1.1.pom b/server/target/ObjectLoggerServer-3.1.2.pom
similarity index 98%
rename from server/target/ObjectLoggerServer-3.1.1.pom
rename to server/target/ObjectLoggerServer-3.1.2.pom
index e5559ab..6b779db 100644
--- a/server/target/ObjectLoggerServer-3.1.1.pom
+++ b/server/target/ObjectLoggerServer-3.1.2.pom
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.yeecode.objectlogger</groupId>
         <artifactId>ObjectLogger</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
     </parent>
     <artifactId>ObjectLoggerServer</artifactId>
     <packaging>jar</packaging>
diff --git a/target/ObjectLogger-3.1.1.pom b/target/ObjectLogger-3.1.2.pom
similarity index 98%
rename from target/ObjectLogger-3.1.1.pom
rename to target/ObjectLogger-3.1.2.pom
index 5b750c1..146da0a 100644
--- a/target/ObjectLogger-3.1.1.pom
+++ b/target/ObjectLogger-3.1.2.pom
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.yeecode.objectlogger</groupId>
     <artifactId>ObjectLogger</artifactId>
-    <version>3.1.1</version>
+    <version>3.1.2</version>
     <name>ObjectLogger</name>
 
     <modules>
@@ -82,7 +82,7 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
-                <version>4.5.9</version>
+                <version>4.5.13</version>
             </dependency>
             <dependency>
                 <groupId>com.github.yeecode.objectlogger</groupId>
@@ -154,7 +154,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.6</version>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <phase>verify</phase>