diff --git a/sdgb-api/Cargo.toml b/sdgb-api/Cargo.toml
index 8aea64d..6fc4c05 100644
--- a/sdgb-api/Cargo.toml
+++ b/sdgb-api/Cargo.toml
@@ -11,6 +11,8 @@ compio = ["dep:compio"]
 tokio = ["dep:tokio"]
 bincode = ["dep:bincode"]
 
+parquet = ['dep:parquet', 'dep:parquet_derive']
+
 [dependencies]
 snafu = { workspace = true }
 serde_json = { workspace = true }
@@ -45,5 +47,5 @@ aes = "0.8.4"
 cipher = { version = "0.4.4", features = ["block-padding"] }
 bincode = { version = "2.0.1", optional = true }
 
-parquet = { workspace = true }
-parquet_derive = { version = "56.0.0" }
+parquet = { version = "56.0.0", optional = true }
+parquet_derive = { version = "56.0.0", optional = true }
diff --git a/sdgb-api/src/title/model/get_user_preview_api/mod.rs b/sdgb-api/src/title/model/get_user_preview_api/mod.rs
index 7f6cb9d..7cc9448 100644
--- a/sdgb-api/src/title/model/get_user_preview_api/mod.rs
+++ b/sdgb-api/src/title/model/get_user_preview_api/mod.rs
@@ -1,7 +1,7 @@
 use std::fmt::Display;
 
 use bincode::{Decode, Encode};
-use parquet_derive::ParquetRecordWriter;
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Serialize)]
@@ -16,7 +16,8 @@ impl From<u32> for GetUserPreviewApi {
     }
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, ParquetRecordWriter)]
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
+#[cfg_attr(feature = "parquet", derive(parquet_derive::ParquetRecordWriter))]
 #[serde(rename_all = "camelCase")]
 pub struct GetUserPreviewApiResp {
     pub user_id: u32,
diff --git a/sdgb-api/src/title/model/get_user_region_api/mod.rs b/sdgb-api/src/title/model/get_user_region_api/mod.rs
index e8232ab..88f04b9 100644
--- a/sdgb-api/src/title/model/get_user_region_api/mod.rs
+++ b/sdgb-api/src/title/model/get_user_region_api/mod.rs
@@ -1,5 +1,4 @@
 use bincode::{Decode, Encode};
-use parquet_derive::ParquetRecordWriter;
 use serde::{Deserialize, Serialize};
 
 #[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -42,7 +41,8 @@ impl From<GetUserRegionApiResp> for Vec<UserRegionFlatten> {
     }
 }
 
-#[derive(Default, Debug, Clone, PartialEq, ParquetRecordWriter)]
+#[derive(Default, Debug, Clone, PartialEq)]
+#[cfg_attr(feature = "parquet", derive(parquet_derive::ParquetRecordWriter))]
 pub struct UserRegionFlatten {
     pub user_id: u32,
     pub region_id: u32,
diff --git a/sdgb-cli/Cargo.toml b/sdgb-cli/Cargo.toml
index d2e44fb..bed4e90 100644
--- a/sdgb-cli/Cargo.toml
+++ b/sdgb-cli/Cargo.toml
@@ -11,7 +11,7 @@ default = ["compio", "fetchall"]
 compio = ["dep:compio", "sdgb-api/compio"]
 tokio = ["dep:tokio", "sdgb-api/tokio"]
 
-fetchall = ["dep:redb", "dep:futures-util"]
+fetchall = ["dep:redb", "dep:futures-util", "dep:parquet", "sdgb-api/parquet"]
 
 [dependencies]
 sdgb-api = { workspace = true, features = ["bincode"] }
@@ -42,7 +42,7 @@ ctrlc = { version = "3.4.7", features = ["termination"] }
 # magic macro
 crabtime = { workspace = true }
 
-parquet = { workspace = true }
+parquet = { workspace = true, optional = true }
 
 [build-dependencies]
 version_check = "0.9.5"
diff --git a/utils/flat_user_detail.py b/utils/flat_user_detail.py
index 7fc84f9..56fcbd2 100644
--- a/utils/flat_user_detail.py
+++ b/utils/flat_user_detail.py
@@ -26,7 +26,8 @@ def calculate_dxrating(music: dict):
     try:
         return music | {"dxRating": dx_rating(Decimal(level.pop()["difficulty"]), ach)}
     except IndexError as _:
-        logger.warning(f"unknown level: {music_id} - {level_id}", file=stderr)
+        if level_id != 10:
+            logger.warning(f"unknown level: {music_id} - {level_id}", file=stderr)
         return music | {"dxRating": 0}