diff --git a/aegisub/build/deps/deps.vcxproj b/aegisub/build/deps/deps.vcxproj
index 328c59a0b..6985fea9f 100644
--- a/aegisub/build/deps/deps.vcxproj
+++ b/aegisub/build/deps/deps.vcxproj
@@ -40,10 +40,10 @@ Aegisub Project http://www.aegisub.org/
     <!-- 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"
+      Url="http://www.aegisub.org/~plorkyeran/icudt51l.dat.tgz"
       Destination="$(MSBuildThisFileDirectory)..\..\..\deps\icu\source\data\in"
-      OutputFile="$(MSBuildThisFileDirectory)..\..\..\deps\icu\source\data\in\icudt50l.dat"
-      Hash="593aa12dc0413163b803582d22197c46804048c8"
+      OutputFile="$(MSBuildThisFileDirectory)..\..\..\deps\icu\source\data\in\icudt51l.dat"
+      Hash="0885a647fdd48645a6bba48a7f8957131882db02"
       />
   </Target>
 </Project>
diff --git a/deps/icu b/deps/icu
index 4083eb0ff..55c280887 160000
--- a/deps/icu
+++ b/deps/icu
@@ -1 +1 @@
-Subproject commit 4083eb0ff15ab52fe5e64e0f1b93bb93de34c1f5
+Subproject commit 55c280887ce31011a147e5bbb56551e9d4b6641d