diff --git a/demo-idempotent/pom.xml b/demo-idempotent/pom.xml
new file mode 100644
index 0000000..02daff6
--- /dev/null
+++ b/demo-idempotent/pom.xml
@@ -0,0 +1,21 @@
+<?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">
+  <parent>
+    <groupId>com.xkcoding</groupId>
+    <artifactId>spring-boot-demo</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+  </parent>
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>demo-idempotent</artifactId>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <properties>
+    <java.version>17</java.version>
+  </properties>
+
+</project>
diff --git a/pom.xml b/pom.xml
index 273b028..de0b912 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,6 +24,7 @@
     <module>demo-api-doc</module>
     <module>demo-monitor</module>
     <module>demo-rate-limit</module>
+    <module>demo-idempotent</module>
     <!--    <module>demo-logback</module>-->
     <!--    <module>demo-log-aop</module>-->
     <!--    <module>demo-exception-handler</module>-->