diff --git a/src/build_mozc.py b/src/build_mozc.py
index 809aa3559..d04b0f26d 100644
--- a/src/build_mozc.py
+++ b/src/build_mozc.py
@@ -275,7 +275,7 @@ def ParseGypOptions(args):
   parser.add_option('--qtver', dest='qtver', choices=('4', '5'), default='4')
   parser.add_option('--version_file', dest='version_file',
                     help='use the specified version template file',
-                    default='data/version/mozc_version_template.txt')
+                    default='data/version/mozc_version_template.bzl')
   AddTargetPlatformOption(parser)
 
   # Mac and Linux
diff --git a/src/build_tools/mozc_version.py b/src/build_tools/mozc_version.py
index a5a852140..8935d1e08 100644
--- a/src/build_tools/mozc_version.py
+++ b/src/build_tools/mozc_version.py
@@ -42,7 +42,7 @@
 Typically version definition file is ${PROJECT_ROOT}/mozc_version.txt
 (Not in the repository because it is generated by this script)
 Typically version template file is
-${PROJECT_ROOT}/data/version/mozc_version_template.txt,
+${PROJECT_ROOT}/data/version/mozc_version_template.bzl,
 which is in the repository.
 The syntax of template is written in the template file.
 """
diff --git a/src/data/version/mozc_version_template.txt b/src/data/version/mozc_version_template.bzl
similarity index 98%
rename from src/data/version/mozc_version_template.txt
rename to src/data/version/mozc_version_template.bzl
index 14ecdc7ba..1d384f03c 100644
--- a/src/data/version/mozc_version_template.txt
+++ b/src/data/version/mozc_version_template.bzl
@@ -1,6 +1,6 @@
 MAJOR=2
 MINOR=18
-BUILD=2555
+BUILD=2556
 REVISION=102
 # CAUTION: NACL_DICTIONARY_VERSION is going to be migrated to ENGINE_VERSION.
 # NACL_DICTIONARY_VERSION is the target version of the system dictionary to be
diff --git a/src/data_manager/data_manager.gypi b/src/data_manager/data_manager.gypi
index 1b56b5104..80a27fb27 100644
--- a/src/data_manager/data_manager.gypi
+++ b/src/data_manager/data_manager.gypi
@@ -900,7 +900,7 @@
           'action_name': 'gen_separate_version_data_for_<(dataset_tag)',
           'variables': {
             'generator': '<(mozc_dir)/data_manager/gen_data_version.py',
-            'version_file': '<(mozc_dir)/data/version/mozc_version_template.txt',
+            'version_file': '<(mozc_dir)/data/version/mozc_version_template.bzl',
           },
           'inputs': [
             '<(generator)',