diff --git a/iast-agent/src/main/java/com/secnium/iast/agent/AttachLauncher.java b/iast-agent/src/main/java/com/secnium/iast/agent/AttachLauncher.java
index 245967b99..05395dea1 100644
--- a/iast-agent/src/main/java/com/secnium/iast/agent/AttachLauncher.java
+++ b/iast-agent/src/main/java/com/secnium/iast/agent/AttachLauncher.java
@@ -20,6 +20,7 @@ public static void attach(String pid, String args) {
             vmObj = VirtualMachine.attach(pid);
             vmObj.loadAgent(AGENT_PATH, "token=" + args);
             LogUtils.info("attach to process " + pid + " success.");
+            vmObj.detach();
         } catch (AttachNotSupportedException e) {
             LogUtils.error("attach failed, reason: Attach not support");
         } catch (IOException e) {
diff --git a/iast-agent/src/main/java/com/secnium/iast/agent/manager/EngineManager.java b/iast-agent/src/main/java/com/secnium/iast/agent/manager/EngineManager.java
index d51c01636..64daabb8d 100644
--- a/iast-agent/src/main/java/com/secnium/iast/agent/manager/EngineManager.java
+++ b/iast-agent/src/main/java/com/secnium/iast/agent/manager/EngineManager.java
@@ -277,7 +277,8 @@ public synchronized boolean uninstall() {
                 classOfEngine.getMethod("destroy", String.class, String.class, Instrumentation.class)
                         .invoke(null, launchMode, this.properties.getPropertiesFilePath(), inst);
                 Agent.appendToolsPath();
-                AttachLauncher.detach(ppid);
+                //no necessary to do detach here
+                // AttachLauncher.detach(ppid);
             }
         } catch (IllegalAccessException e) {
             e.printStackTrace();