diff --git a/Flow.Launcher.Core/Plugin/PluginConfig.cs b/Flow.Launcher.Core/Plugin/PluginConfig.cs
index c36534537..b946fa44d 100644
--- a/Flow.Launcher.Core/Plugin/PluginConfig.cs
+++ b/Flow.Launcher.Core/Plugin/PluginConfig.cs
@@ -1,8 +1,9 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.IO;
 using Newtonsoft.Json;
+using Flow.Launcher.Infrastructure;
 using Flow.Launcher.Infrastructure.Logger;
 using Flow.Launcher.Plugin;
 
@@ -11,8 +12,6 @@ namespace Flow.Launcher.Core.Plugin
 
     internal abstract class PluginConfig
     {
-        private const string PluginConfigName = "plugin.json";
-
         /// <summary>
         /// Parse plugin metadata in the given directories
         /// </summary>
@@ -52,7 +51,7 @@ namespace Flow.Launcher.Core.Plugin
 
         private static PluginMetadata GetPluginMetadata(string pluginDirectory)
         {
-            string configPath = Path.Combine(pluginDirectory, PluginConfigName);
+            string configPath = Path.Combine(pluginDirectory, Constant.PluginMetadataFileName);
             if (!File.Exists(configPath))
             {
                 Log.Error($"|PluginConfig.GetPluginMetadata|Didn't find config file <{configPath}>");
diff --git a/Flow.Launcher.Core/Plugin/PluginInstaller.cs b/Flow.Launcher.Core/Plugin/PluginInstaller.cs
index efb239d7e..b284b957f 100644
--- a/Flow.Launcher.Core/Plugin/PluginInstaller.cs
+++ b/Flow.Launcher.Core/Plugin/PluginInstaller.cs
@@ -4,6 +4,7 @@ using System.Windows;
 using ICSharpCode.SharpZipLib.Zip;
 using Newtonsoft.Json;
 using Flow.Launcher.Plugin;
+using Flow.Launcher.Infrastructure;
 using Flow.Launcher.Infrastructure.Logger;
 
 namespace Flow.Launcher.Core.Plugin
@@ -21,7 +22,7 @@ namespace Flow.Launcher.Core.Plugin
                 }
                 UnZip(path, tempFoler, true);
 
-                string iniPath = Path.Combine(tempFoler, "plugin.json");
+                string iniPath = Path.Combine(tempFoler, Constant.PluginMetadataFileName);
                 if (!File.Exists(iniPath))
                 {
                     MessageBox.Show("Install failed: plugin config is missing");
@@ -95,7 +96,7 @@ namespace Flow.Launcher.Core.Plugin
 
         private static PluginMetadata GetMetadataFromJson(string pluginDirectory)
         {
-            string configPath = Path.Combine(pluginDirectory, "plugin.json");
+            string configPath = Path.Combine(pluginDirectory, Constant.PluginMetadataFileName);
             PluginMetadata metadata;
 
             if (!File.Exists(configPath))
diff --git a/Flow.Launcher.Infrastructure/Constant.cs b/Flow.Launcher.Infrastructure/Constant.cs
index 0936ce8c4..a96d0e5b3 100644
--- a/Flow.Launcher.Infrastructure/Constant.cs
+++ b/Flow.Launcher.Infrastructure/Constant.cs
@@ -8,6 +8,7 @@ namespace Flow.Launcher.Infrastructure
     {
         public const string FlowLauncher = "Flow.Launcher";
         public const string Plugins = "Plugins";
+        public const string PluginMetadataFileName = "plugin.json";
 
         public const string ApplicationFileName = FlowLauncher + ".exe";
 
diff --git a/Plugins/Flow.Launcher.Plugin.PluginManagement/Main.cs b/Plugins/Flow.Launcher.Plugin.PluginManagement/Main.cs
index 586513acd..e1b631517 100644
--- a/Plugins/Flow.Launcher.Plugin.PluginManagement/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.PluginManagement/Main.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -17,7 +17,6 @@ namespace Flow.Launcher.Plugin.PluginManagement
     public class Main : IPlugin, IPluginI18n
     {
         private static string APIBASE = "http://api.wox.one";
-        private static string PluginConfigName = "plugin.json";
         private static string pluginSearchUrl = APIBASE + "/plugin/search/";
         private const string ListCommand = "list";
         private const string InstallCommand = "install";