diff --git a/src/Umbraco.Core/Configuration/ClientDependencyConfiguration.cs b/src/Umbraco.Core/Configuration/ClientDependencyConfiguration.cs
index 6fbdec6901..b3076f2143 100644
--- a/src/Umbraco.Core/Configuration/ClientDependencyConfiguration.cs
+++ b/src/Umbraco.Core/Configuration/ClientDependencyConfiguration.cs
@@ -1,6 +1,10 @@
 using System;
-using System.Linq;
+using System.Collections.Generic;
+using System.IO;
+using System.Web;
 using System.Xml.Linq;
+using ClientDependency.Core.CompositeFiles.Providers;
+using ClientDependency.Core.Config;
 using Umbraco.Core.IO;
 using Umbraco.Core.Logging;
 
@@ -49,5 +53,57 @@ namespace Umbraco.Core.Configuration
 
             return false;
         }
+
+        /// <summary>
+        /// Clears the temporary files stored for the ClientDependency folder
+        /// </summary>
+        /// <param name="currentHttpContext"></param>
+        internal bool ClearTempFiles(HttpContextBase currentHttpContext)
+        {
+            var cdfTempDirectories = new HashSet<string>();
+            foreach (BaseCompositeFileProcessingProvider provider in ClientDependencySettings.Instance
+                .CompositeFileProcessingProviderCollection)
+            {
+                var path = provider.CompositeFilePath.FullName;
+                cdfTempDirectories.Add(path);
+            }
+
+            try
+            {
+                var relativePath = currentHttpContext.Server.MapPath(XmlFileMapper.FileMapVirtualFolder);
+                if (relativePath != null)
+                {
+                    var directoryInfo = new DirectoryInfo(relativePath);
+                    var path = directoryInfo.FullName;
+                    cdfTempDirectories.Add(path);
+                }
+            }
+            catch (Exception ex)
+            {
+                //invalid path format or something... try/catch to be safe
+                LogHelper.Error<ClientDependencyConfiguration>("Could not get path from ClientDependency.config", ex);
+            }
+
+            var noErrorsDeleting = true;
+            foreach (var directory in cdfTempDirectories)
+            {
+                var directoryInfo = new DirectoryInfo(directory);
+                if (directoryInfo.Exists == false)
+                    continue;
+
+                try
+                {
+                    directoryInfo.Delete(true);
+                }
+                catch (Exception ex)
+                {
+                    // Something could be locking the directory or the was another error, making sure we don't break the upgrade installer
+                    LogHelper.Error<ClientDependencyConfiguration>("Could not clear temp files", ex);
+                    noErrorsDeleting = false;
+                }
+            }
+
+            return noErrorsDeleting;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 3adf99981a..3850fb98b0 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -45,6 +45,9 @@
       <HintPath>..\packages\AutoMapper.3.3.1\lib\net40\AutoMapper.Net4.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="ClientDependency.Core, Version=1.9.2.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\ClientDependency.1.9.2\lib\net45\ClientDependency.Core.dll</HintPath>
+    </Reference>
     <Reference Include="HtmlAgilityPack, Version=1.4.9.5, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a, processorArchitecture=MSIL">
       <HintPath>..\packages\HtmlAgilityPack.1.4.9.5\lib\Net45\HtmlAgilityPack.dll</HintPath>
       <Private>True</Private>
diff --git a/src/Umbraco.Core/packages.config b/src/Umbraco.Core/packages.config
index dd00d61ea6..2a84e2d967 100644
--- a/src/Umbraco.Core/packages.config
+++ b/src/Umbraco.Core/packages.config
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="AutoMapper" version="3.3.1" targetFramework="net45" />
+  <package id="ClientDependency" version="1.9.2" targetFramework="net45" />
   <package id="HtmlAgilityPack" version="1.4.9.5" targetFramework="net45" />
   <package id="ImageProcessor" version="2.5.3" targetFramework="net45" />
   <package id="log4net" version="2.0.8" targetFramework="net45" />
diff --git a/src/Umbraco.Web/Install/Controllers/InstallController.cs b/src/Umbraco.Web/Install/Controllers/InstallController.cs
index 360e35efda..7e3336e1e8 100644
--- a/src/Umbraco.Web/Install/Controllers/InstallController.cs
+++ b/src/Umbraco.Web/Install/Controllers/InstallController.cs
@@ -47,6 +47,8 @@ namespace Umbraco.Web.Install.Controllers
                 // Update ClientDependency version
                 var clientDependencyConfig = new ClientDependencyConfiguration(ApplicationContext.Current.ProfilingLogger.Logger);
                 var clientDependencyUpdated = clientDependencyConfig.IncreaseVersionNumber();
+                // Delete ClientDependency temp directories to make sure we get fresh caches
+                var clientDependencyTempFilesDeleted = clientDependencyConfig.ClearTempFiles(HttpContext);
 
                 var result = _umbracoContext.Security.ValidateCurrentUser(false);