diff --git a/source/lunch/update.d b/source/lunch/update.d
index d4670a6..62e422f 100644
--- a/source/lunch/update.d
+++ b/source/lunch/update.d
@@ -25,14 +25,14 @@ private struct RemoteFile
     string source;
     string hash;
     ulong  size;
-    size_t mtime;
+    long   mtime;
 }
 
 private struct Remote
 {
     string source;
     ulong  size;
-    size_t mtime;
+    long   mtime;
     RemoteFile[] files;
 }
 
@@ -40,7 +40,7 @@ private struct LocalFile
 {
     string file;
     ulong  size;
-    size_t mtime;
+    long   mtime;
 
     string hash() inout @property
     {
@@ -64,7 +64,7 @@ private struct LocalFile
 private struct Local
 {
     ulong  size;
-    size_t mtime;
+    long   mtime;
     LocalFile[] files;
 }
 
@@ -76,10 +76,10 @@ private struct Action
         download,
     }
 
-    What what;
+    What   what;
     string file;
     string url;
-    size_t mtime;
+    long   mtime;
 
     alias this = what;
 }
@@ -228,7 +228,7 @@ private string workdir(string path)
 }
 
 
-private void touch(string path, size_t mtime = Clock.currTime().toUnixTime)
+private void touch(string path, long mtime = Clock.currTime().toUnixTime)
 {
     infof("Touching %s", path);
     SysTime old_atime, old_mtime;
@@ -287,7 +287,7 @@ private immutable(Local) local()
 
         loc.files ~= LocalFile(
             file: entry.name.relativePath(workdir).replace('\\', '/'),
-            size: entry.size.to!uint,
+            size: entry.size.to!ulong,
             mtime: entry.timeLastModified.toUnixTime,
         );