diff --git a/src/limestone/datastore_format.cpp b/src/limestone/datastore_format.cpp
index 59c857e6..45239913 100644
--- a/src/limestone/datastore_format.cpp
+++ b/src/limestone/datastore_format.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2023 Project Tsurugi.
+ * Copyright 2023-2024 Project Tsurugi.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,9 +31,9 @@ using namespace limestone::api;
 
 // setup log-dir with no data
 void setup_initial_logdir(const boost::filesystem::path& logdir) {
-    nlohmann::json manifest_v1 = {
+    nlohmann::json manifest_current = {
         { "format_version", "1.0" },
-        { "persistent_format_version", 1 }
+        { "persistent_format_version", current_persistent_format_version }
     };
     boost::filesystem::path config = logdir / std::string(manifest_file_name);
     FILE* strm = fopen(config.c_str(), "w");  // NOLINT(*-owning-memory)
@@ -41,7 +41,7 @@ void setup_initial_logdir(const boost::filesystem::path& logdir) {
         LOG_LP(ERROR) << "fopen for write failed, errno = " << errno;
         throw std::runtime_error("I/O error");
     }
-    std::string manifest_str = manifest_v1.dump(4);
+    std::string manifest_str = manifest_current.dump(4);
     auto ret = fwrite(manifest_str.c_str(), manifest_str.length(), 1, strm);
     if (ret != 1) {
         LOG_LP(ERROR) << "fwrite failed, errno = " << errno;
@@ -75,10 +75,13 @@ int is_supported_version(const boost::filesystem::path& manifest_path, std::stri
         istrm >> manifest;
         auto version = manifest["persistent_format_version"];
         if (version.is_number_integer()) {
-            if (version == 1) {
+            if (version == current_persistent_format_version) {
                 return 1;  // supported
             }
-            errmsg = "version mismatch: version " + version.dump() + ", server supports version 1";
+            // if versions other than current_persistent_format_version are supported, add here
+
+            // unsupported
+            errmsg = "version mismatch: version " + version.dump() + ", server supports version " + std::to_string(current_persistent_format_version);
             return 0;
         }
         errmsg = "invalid manifest file, invalid persistent_format_version: " + version.dump();
@@ -94,7 +97,7 @@ void check_logdir_format(const boost::filesystem::path& logdir) {
     boost::filesystem::path manifest_path = logdir / std::string(manifest_file_name);
     if (!boost::filesystem::exists(manifest_path)) {
         VLOG_LP(log_info) << "no manifest file in logdir, maybe v0";
-        LOG(ERROR) << version_error_prefix << " (version mismatch: version 0, server supports version 1)";
+        LOG(ERROR) << version_error_prefix << " (version mismatch: version 0, server supports version " << current_persistent_format_version << ")";
         throw std::runtime_error("logdir version mismatch");
     }
     std::string errmsg;
diff --git a/src/limestone/dblogutil/dblogutil.cpp b/src/limestone/dblogutil/dblogutil.cpp
index dab72eb6..cc11a83e 100644
--- a/src/limestone/dblogutil/dblogutil.cpp
+++ b/src/limestone/dblogutil/dblogutil.cpp
@@ -59,7 +59,7 @@ void log_and_exit(int error) {
 namespace limestone {
 
 void inspect(dblog_scan &ds, std::optional<epoch_id_type> epoch) {
-    std::cout << "persistent-format-version: 1" << std::endl;
+    std::cout << "persistent-format-version: " << internal::current_persistent_format_version << std::endl;
     epoch_id_type ld_epoch{};
     try {
         ld_epoch = ds.last_durable_epoch_in_dir();
diff --git a/src/limestone/internal.h b/src/limestone/internal.h
index a83df066..e639a1c8 100644
--- a/src/limestone/internal.h
+++ b/src/limestone/internal.h
@@ -46,6 +46,8 @@ std::optional<epoch_id_type> last_durable_epoch(const boost::filesystem::path& f
 
 inline constexpr const std::string_view manifest_file_name = "limestone-manifest.json";
 
+inline constexpr const int current_persistent_format_version = 2;
+
 void setup_initial_logdir(const boost::filesystem::path& logdir);
 
 /**
diff --git a/test/limestone/log/log_dir_test.cpp b/test/limestone/log/log_dir_test.cpp
index 0eead184..27d88db8 100644
--- a/test/limestone/log/log_dir_test.cpp
+++ b/test/limestone/log/log_dir_test.cpp
@@ -17,7 +17,7 @@ namespace limestone::testing {
 extern void create_file(const boost::filesystem::path& path, std::string_view content);
 extern const std::string_view epoch_0_str;
 extern const std::string_view epoch_0x100_str;
-extern std::string data_manifest(int persistent_format_version = 1);
+extern std::string data_manifest(int persistent_format_version = limestone::internal::current_persistent_format_version);
 extern const std::string_view data_normal;
 extern const std::string_view data_nondurable;
 
@@ -51,7 +51,7 @@ const boost::filesystem::path manifest_path = boost::filesystem::path(location)
     static bool is_pwal(const boost::filesystem::path& p) { return starts_with(p.filename().string(), "pwal"); }
     static void ignore_entry(limestone::api::log_entry&) {}
 
-    void create_mainfest_file(int persistent_format_version = 1) {
+    void create_mainfest_file(int persistent_format_version = limestone::internal::current_persistent_format_version) {
         create_file(manifest_path, data_manifest(persistent_format_version));
     }
 
@@ -112,20 +112,21 @@ TEST_F(log_dir_test, accept_directory_only_correct_manifest_file) {
 }
 
 TEST_F(log_dir_test, reject_directory_of_different_version) {
-    create_mainfest_file(222);
+    create_mainfest_file(limestone::internal::current_persistent_format_version + 222);
 
     gen_datastore();
     EXPECT_THROW({ limestone::internal::check_logdir_format(location); }, std::exception);
 }
 
-TEST_F(log_dir_test, rotate_old_ok_v1_dir) {
+TEST_F(log_dir_test, rotate_old_ok_current_ver_dir) {
     // setup backups
     boost::filesystem::path bk_path = boost::filesystem::path(location) / "bk";
     if (!boost::filesystem::create_directory(bk_path)) {
         LOG(FATAL) << "cannot make directory";
     }
     create_file(bk_path / "epoch", epoch_0_str);
-    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(1));
+    create_file(bk_path / std::string(limestone::internal::manifest_file_name),
+                data_manifest(limestone::internal::current_persistent_format_version));
 
     gen_datastore();
 
@@ -139,7 +140,8 @@ TEST_F(log_dir_test, rotate_old_rejects_unsupported_data) {
         LOG(FATAL) << "cannot make directory";
     }
     create_file(bk_path / "epoch", epoch_0_str);
-    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(2));
+    create_file(bk_path / std::string(limestone::internal::manifest_file_name),
+                data_manifest(limestone::internal::current_persistent_format_version + 222));
 
     gen_datastore();
 
@@ -174,14 +176,14 @@ TEST_F(log_dir_test, rotate_old_rejects_corrupted_dir) {
     EXPECT_EQ(datastore_->restore(bk_path.string(), true), limestone::status::err_broken_data);
 }
 
-TEST_F(log_dir_test, rotate_prusik_ok_v1_dir) {
+TEST_F(log_dir_test, rotate_prusik_ok_current_ver_dir) {
     // setup backups
     boost::filesystem::path bk_path = boost::filesystem::path(location) / "bk";
     if (!boost::filesystem::create_directory(bk_path)) {
         LOG(FATAL) << "cannot make directory";
     }
     create_file(bk_path / "epoch", epoch_0_str);
-    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(1));
+    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(limestone::internal::current_persistent_format_version));
     // setup entries
     std::vector<limestone::api::file_set_entry> entries;
     entries.emplace_back("epoch", "epoch", false);
@@ -199,7 +201,7 @@ TEST_F(log_dir_test, rotate_prusik_rejects_unsupported_data) {
         LOG(FATAL) << "cannot make directory";
     }
     create_file(bk_path / "epoch", epoch_0_str);
-    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(2));
+    create_file(bk_path / std::string(limestone::internal::manifest_file_name), data_manifest(limestone::internal::current_persistent_format_version + 222));
     // setup entries
     std::vector<limestone::api::file_set_entry> entries;
     entries.emplace_back("epoch", "epoch", false);
diff --git a/test/limestone/log/rotate_test.cpp b/test/limestone/log/rotate_test.cpp
index 460c5b26..e864c17c 100644
--- a/test/limestone/log/rotate_test.cpp
+++ b/test/limestone/log/rotate_test.cpp
@@ -50,7 +50,7 @@ class rotate_test : public ::testing::Test {
 };
 
 extern void create_file(const boost::filesystem::path& path, std::string_view content);
-extern std::string data_manifest(int persistent_format_version = 1);
+extern std::string data_manifest(int persistent_format_version = limestone::internal::current_persistent_format_version);
 
 TEST_F(rotate_test, log_is_rotated) { // NOLINT
     using namespace limestone::api;
@@ -249,7 +249,7 @@ TEST_F(rotate_test, restore_prusik_all_abs) { // NOLINT
     auto conffn = std::string(limestone::internal::manifest_file_name);
     auto confd = location_path / "bk0";
     boost::filesystem::create_directories(confd);
-    create_file(confd / conffn, data_manifest(1));
+    create_file(confd / conffn, data_manifest(limestone::internal::current_persistent_format_version));
     data.emplace_back(confd / conffn, conffn, false);
 #endif
 
@@ -299,7 +299,7 @@ TEST_F(rotate_test, restore_prusik_all_rel) { // NOLINT
     std::string conffn(limestone::internal::manifest_file_name);
     auto confd = location_path / "bk0";
     boost::filesystem::create_directories(confd);
-    create_file(confd / conffn, data_manifest(1));
+    create_file(confd / conffn, data_manifest(limestone::internal::current_persistent_format_version));
     data.emplace_back("bk0/" + conffn, conffn, false);
 #endif
 
diff --git a/test/limestone/log/testdata.cpp b/test/limestone/log/testdata.cpp
index 5fd24620..d35f9e07 100644
--- a/test/limestone/log/testdata.cpp
+++ b/test/limestone/log/testdata.cpp
@@ -102,7 +102,7 @@ extern constexpr const std::string_view data_allzero =
     "\x00\x00\x00\x00\x00\x00\x00\x00\x00"  // UNKNOWN_TYPE_entry
     ""sv;
 
-std::string data_manifest(int persistent_format_version = 1) {
+std::string data_manifest(int persistent_format_version = limestone::internal::current_persistent_format_version) {
     std::ostringstream ss;
     ss << "{ \"format_version\": \"1.0\", \"persistent_format_version\": " << persistent_format_version << " }";
     return ss.str();
diff --git a/test/limestone/utils/dblogutil_compaction_test.cpp b/test/limestone/utils/dblogutil_compaction_test.cpp
index dbde5593..fc08b95d 100644
--- a/test/limestone/utils/dblogutil_compaction_test.cpp
+++ b/test/limestone/utils/dblogutil_compaction_test.cpp
@@ -19,7 +19,7 @@ using namespace limestone::internal;
 
 extern void create_file(const boost::filesystem::path& path, std::string_view content);
 extern std::string read_entire_file(const boost::filesystem::path& path);
-extern std::string data_manifest(int persistent_format_version = 1);
+extern std::string data_manifest(int persistent_format_version = limestone::internal::current_persistent_format_version);
 
 extern const std::string_view epoch_0x100_str;
 
diff --git a/test/limestone/utils/dblogutil_test.cpp b/test/limestone/utils/dblogutil_test.cpp
index 6088db64..9288a310 100644
--- a/test/limestone/utils/dblogutil_test.cpp
+++ b/test/limestone/utils/dblogutil_test.cpp
@@ -19,7 +19,7 @@ using namespace limestone::internal;
 
 extern void create_file(const boost::filesystem::path& path, std::string_view content);
 extern std::string read_entire_file(const boost::filesystem::path& path);
-extern std::string data_manifest(int persistent_format_version = 1);
+extern std::string data_manifest(int persistent_format_version = limestone::internal::current_persistent_format_version);
 
 extern const std::string_view epoch_0x100_str;