diff --git a/include/seafile/fs/seafile_store.hpp b/include/seafile/fs/seafile_store.hpp
index ae20b86..bdc7816 100644
--- a/include/seafile/fs/seafile_store.hpp
+++ b/include/seafile/fs/seafile_store.hpp
@@ -65,7 +65,7 @@ namespace seafile::fs
         [[nodiscard]] tl::expected<api::AccountInfo, api::SeafileException> accountInfo() const;
 
         /// 同步用户信息
-        [[nodiscard]] tl::expected<void, api::SeafileException> syncUserInfo();
+        [[nodiscard]] tl::expected<void, api::SeafileException> syncUserInfo() const;
 
         /// 同步repo信息
         [[nodiscard]] tl::expected<std::vector<storage::RepoInfo>, api::SeafileException> syncRepos();
@@ -76,6 +76,7 @@ namespace seafile::fs
         static std::filesystem::path storePath();
 
         /// 获取路径信息
+        /// @param repo_id repo id
         /// @param path 路径
         /// @return 路径信息
         tl::expected<storage::RepoEntry, api::SeafileException> findRepoEntry(
@@ -85,7 +86,7 @@ namespace seafile::fs
         tl::expected<storage::RepoInfo, api::SeafileException> findRepoByName(const std::string& name);
 
         tl::expected<void, api::SeafileException> fetchAndStoreRepoDir(
-            const std::string& repo_id, const std::string& parent_path);
+            const std::string& repo_id, const std::string& parent_path) const;
 
         std::vector<storage::RepoEntry> queryDirectoryChildren(
             const std::string& repo_id, const std::string& parent_path);
diff --git a/include/seafile/literals/units.hpp b/include/seafile/literals/units.hpp
index ebb6acf..a51df13 100644
--- a/include/seafile/literals/units.hpp
+++ b/include/seafile/literals/units.hpp
@@ -4,22 +4,21 @@
 
 #ifndef SEADISK_UNITS_HPP
 #define SEADISK_UNITS_HPP
-#include <cstddef>
 
 namespace seafile::literals {
-    constexpr std::size_t operator"" _B(unsigned long long v) {
+    constexpr std::size_t operator ""_B(unsigned long long v) {
         return v;
     }
 
-    constexpr std::size_t operator"" _KB(unsigned long long v) {
+    constexpr std::size_t operator ""_KB(unsigned long long v) {
         return v * 1024ULL;
     }
 
-    constexpr std::size_t operator"" _MB(unsigned long long v) {
+    constexpr std::size_t operator ""_MB(unsigned long long v) {
         return v * 1024ULL * 1024ULL;
     }
 
-    constexpr std::size_t operator"" _GB(unsigned long long v) {
+    constexpr std::size_t operator ""_GB(unsigned long long v) {
         return v * 1024ULL * 1024ULL * 1024ULL;
     }
 }
diff --git a/src/seafile/fs/seafile_store.cpp b/src/seafile/fs/seafile_store.cpp
index 1409ca4..f07af0d 100644
--- a/src/seafile/fs/seafile_store.cpp
+++ b/src/seafile/fs/seafile_store.cpp
@@ -301,8 +301,7 @@ namespace seafile::fs
         return this->sync();
     }
 
-    tl::expected<void, api::SeafileException> SeafileStore::syncUserInfo()
-    {
+    tl::expected<void, api::SeafileException> SeafileStore::syncUserInfo() const {
         const auto user_info = this->api.accountInfo();
         if (!user_info)
         {
@@ -388,8 +387,7 @@ namespace seafile::fs
     }
 
     tl::expected<void, api::SeafileException> SeafileStore::fetchAndStoreRepoDir(
-        const std::string& repo_id, const std::string& parent_path)
-    {
+        const std::string& repo_id, const std::string& parent_path) const {
         const auto entries = this->api.repoDir(repo_id, parent_path);
         if (!entries)
         {