diff --git a/chunkdisk.rc b/chunkdisk.rc
index 289909d..e5c544f 100644
--- a/chunkdisk.rc
+++ b/chunkdisk.rc
@@ -1,8 +1,8 @@
 #include <winver.h>
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,2,0,0
- PRODUCTVERSION 1,2,0,0
+ FILEVERSION 1,3,0,0
+ PRODUCTVERSION 1,3,0,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -18,12 +18,12 @@ BEGIN
         BLOCK "040904b0"
         BEGIN
             VALUE "FileDescription", "chunkdisk"
-            VALUE "FileVersion", "1.2.0.0"
+            VALUE "FileVersion", "1.3.0.0"
             VALUE "InternalName", "chunkdisk.exe"
             VALUE "LegalCopyright", "Copyright (C) 2021 extratype"
             VALUE "OriginalFilename", "chunkdisk.exe"
             VALUE "ProductName", "chunkdisk"
-            VALUE "ProductVersion", "1.2.0.0"
+            VALUE "ProductVersion", "1.3.0.0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/docs/changes.txt b/docs/changes.txt
index d12dbf8..432f9dd 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -49,3 +49,7 @@ v1.2
 * The `.lock` file is not removed automatically on exit if `-W 0` option is given. Manually remove it to mount again with `-W 1` option.
 * Close file handles to trigger updating metadata when the virtual disk is not only idle but under low load for a minute.
 * Handle the case where the file system does not support FSCTL_SET_ZERO_DATA IOCTL.
+
+v1.3
+
+* Add option (`-Z 0`) to disable zero-fill partially unmapped chunk.
diff --git a/main.cpp b/main.cpp
index 0dc1103..ad30049 100644
--- a/main.cpp
+++ b/main.cpp
@@ -440,7 +440,7 @@ DWORD CreateStorageUnit(PWSTR chunkdisk_file, const BOOLEAN write_protected, con
     err = [&bases, write_protected, pipe_name, &unit]() -> DWORD
     {
         constexpr wchar_t ProductId[] = L"ChunkDisk";
-        constexpr wchar_t ProductRevision[] = L"1.2";
+        constexpr wchar_t ProductRevision[] = L"1.3";
         auto unit_params = SPD_STORAGE_UNIT_PARAMS();
 
         UuidCreate(&unit_params.Guid);