diff --git a/core/pom.xml b/core/pom.xml
index e3adcfd9e..608239b10 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -68,6 +68,13 @@
     </build>
 
     <dependencies>
+        <dependency>
+            <groupId>com.taobao.arthas</groupId>
+            <artifactId>arthas-spy</artifactId>
+            <version>${project.version}</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+        </dependency>
         <dependency>
             <groupId>com.taobao.arthas</groupId>
             <artifactId>arthas-common</artifactId>
diff --git a/core/src/main/java/one/profiler/AsyncProfiler.java b/spy/src/main/java/one/profiler/AsyncProfiler.java
similarity index 100%
rename from core/src/main/java/one/profiler/AsyncProfiler.java
rename to spy/src/main/java/one/profiler/AsyncProfiler.java
diff --git a/core/src/main/java/one/profiler/AsyncProfilerMXBean.java b/spy/src/main/java/one/profiler/AsyncProfilerMXBean.java
similarity index 100%
rename from core/src/main/java/one/profiler/AsyncProfilerMXBean.java
rename to spy/src/main/java/one/profiler/AsyncProfilerMXBean.java
diff --git a/core/src/main/java/one/profiler/Counter.java b/spy/src/main/java/one/profiler/Counter.java
similarity index 100%
rename from core/src/main/java/one/profiler/Counter.java
rename to spy/src/main/java/one/profiler/Counter.java
diff --git a/core/src/main/java/one/profiler/Events.java b/spy/src/main/java/one/profiler/Events.java
similarity index 100%
rename from core/src/main/java/one/profiler/Events.java
rename to spy/src/main/java/one/profiler/Events.java
diff --git a/core/src/main/java/one/profiler/package-info.java b/spy/src/main/java/one/profiler/package-info.java
similarity index 100%
rename from core/src/main/java/one/profiler/package-info.java
rename to spy/src/main/java/one/profiler/package-info.java