diff --git a/Installer/AppDelegate.swift b/Installer/AppDelegate.swift
index 6f7a18dd..e6f77ff6 100644
--- a/Installer/AppDelegate.swift
+++ b/Installer/AppDelegate.swift
@@ -13,6 +13,7 @@ import IMKUtils
 import InputMethodKit
 
 public let kTargetBin = "vChewing"
+public let kTargetBinPhraseEditor = "vChewingPhraseEditor"
 public let kTargetType = "app"
 public let kTargetBundle = "vChewing.app"
 public let kTargetBundleWithComponents = "Library/Input%20Methods/vChewing.app"
diff --git a/Installer/AppDelegate_Extension.swift b/Installer/AppDelegate_Extension.swift
index dcce917a..4611d869 100644
--- a/Installer/AppDelegate_Extension.swift
+++ b/Installer/AppDelegate_Extension.swift
@@ -51,6 +51,12 @@ extension AppDelegate {
     killTask.launch()
     killTask.waitUntilExit()
 
+    let killTask2 = Process()
+    killTask2.launchPath = "/usr/bin/killall"
+    killTask2.arguments = ["-9", kTargetBinPhraseEditor]
+    killTask2.launch()
+    killTask2.waitUntilExit()
+
     if shouldWaitForTranslocationRemoval {
       progressIndicator.startAnimation(self)
       window.beginSheet(progressSheet) { returnCode in
diff --git a/Installer/pkgPreInstall.sh b/Installer/pkgPreInstall.sh
index 72c22905..6a9ab99b 100644
--- a/Installer/pkgPreInstall.sh
+++ b/Installer/pkgPreInstall.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 killall vChewing || true
+killall vChewingPhraseEditor || true
 
 if [ "${login_user}" = root ]; then
     rm -rf /Library/Input\ Methods/vChewing.app || true