diff --git a/aegisub/build/BuildTasks/DependencyFetchers.fs b/aegisub/build/BuildTasks/DependencyFetchers.fs
index f5a360327..626eb3a01 100644
--- a/aegisub/build/BuildTasks/DependencyFetchers.fs
+++ b/aegisub/build/BuildTasks/DependencyFetchers.fs
@@ -95,6 +95,14 @@ type GitProject() =
       this.Log.LogErrorFromException e
       false
 
+let downloadArchive (url : String) unpackDest =
+  use wc = new Net.WebClient()
+  use downloadStream = wc.OpenRead url
+  use gzStream = new ICSharpCode.SharpZipLib.GZip.GZipInputStream(downloadStream)
+  use tarStream = new ICSharpCode.SharpZipLib.Tar.TarInputStream(gzStream)
+  use tarArchive = ICSharpCode.SharpZipLib.Tar.TarArchive.CreateInputTarArchive tarStream
+  tarArchive.ExtractContents unpackDest
+
 type TarballProject() =
   inherit Task()
 
@@ -111,13 +119,8 @@ type TarballProject() =
       try IO.Directory.Delete(directory, true) with | :? IO.IOException -> ()
 
       this.Log.LogMessage ("Downloading {0} {1} from {2}", project.ItemSpec, version, project.GetMetadata "Url")
-      use wc = new Net.WebClient()
-      use downloadStream = project.GetMetadata "Url" |> wc.OpenRead
-      use gzStream = new ICSharpCode.SharpZipLib.GZip.GZipInputStream(downloadStream)
-      use tarStream = new ICSharpCode.SharpZipLib.Tar.TarInputStream(gzStream)
-      use tarArchive = ICSharpCode.SharpZipLib.Tar.TarArchive.CreateInputTarArchive tarStream
+      downloadArchive (project.GetMetadata "Url") (sprintf @"%s\.." directory)
 
-      sprintf @"%s\.." directory |> tarArchive.ExtractContents
       let dirname = project.GetMetadata "DirName"
       if not <| String.IsNullOrWhiteSpace dirname
       then IO.Directory.Move(dirname |> sprintf @"%s\..\%s" directory, directory)
@@ -138,3 +141,28 @@ type TarballProject() =
     with e ->
       this.Log.LogErrorFromException e
       false
+
+type DownloadTgzFile() =
+  inherit Task()
+
+  member val Url = "" with get, set
+  member val Destination = "" with get, set
+  member val OutputFile = "" with get, set
+  member val Hash = "" with get, set
+
+  override this.Execute() =
+    let needsDownload =
+      try
+        use fs = IO.File.OpenRead this.OutputFile
+        let sha = new Security.Cryptography.SHA1Managed ()
+        let hash = sha.ComputeHash fs
+        BitConverter.ToString(hash).Replace("-", "") <> this.Hash
+      with | :? IO.IOException -> true
+
+    try
+      if needsDownload
+      then downloadArchive this.Url this.Destination
+      true
+    with e ->
+      this.Log.LogErrorFromException e
+      false
diff --git a/aegisub/build/deps/deps.vcxproj b/aegisub/build/deps/deps.vcxproj
index 3a370ede1..4d4d9cc84 100644
--- a/aegisub/build/deps/deps.vcxproj
+++ b/aegisub/build/deps/deps.vcxproj
@@ -64,6 +64,7 @@ Aegisub Project http://www.aegisub.org/
   <Import Project="$(MSBuildThisFileDirectory)\..\aegisub.props" />
   <UsingTask TaskName="GitProject" AssemblyFile="$(AegisubBinaryDir)BuildTasks.dll" />
   <UsingTask TaskName="TarballProject" AssemblyFile="$(AegisubBinaryDir)BuildTasks.dll" />
+  <UsingTask TaskName="DownloadTgzFile" AssemblyFile="$(AegisubBinaryDir)BuildTasks.dll" />
 
   <Target Name="Build">
     <GitProject
@@ -73,5 +74,14 @@ Aegisub Project http://www.aegisub.org/
       />
 
     <TarballProject Projects="@(TarballProject)" Root="$(MSBuildThisFileDirectory)..\..\..\deps" />
+
+    <!-- Generated with http://apps.icu-project.org/datacustom/ -->
+    <!-- Includes Break Iterator and Collator data only -->
+    <DownloadTgzFile
+      Url="http://www.aegisub.org/~plorkyeran/icudt50l.dat.tgz"
+      Destination="$(MSBuildThisFileDirectory)..\..\..\deps\icu\source\data\in"
+      OutputFile="$(MSBuildThisFileDirectory)..\..\..\deps\icu\source\data\in\icudt50l.dat"
+      Hash="593aa12dc0413163b803582d22197c46804048c8"
+      />
   </Target>
 </Project>