diff --git a/Cargo.toml b/Cargo.toml
index fa8cc20..3c43456 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,6 +31,7 @@ openssl = { version = "0", features = ["vendored"] }
 prost = { version = "0" }
 reqwest = { version = "0", features = ["json"] }
 serde = { version = "1", features = ["derive"] }
+serde_bytes = { version = "0" }
 serde_json = { version = "1" }
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 tokio-cron-scheduler = { version = "0" }
diff --git a/src/api/betting/models.rs b/src/api/betting/models.rs
index 353da34..4252bb8 100644
--- a/src/api/betting/models.rs
+++ b/src/api/betting/models.rs
@@ -36,8 +36,8 @@ pub struct Betting {
   #[serde(rename = "groupKey")]
   pub group_key: Option<String>,
   /// 게임 데이터
-  #[serde(skip_deserializing)]
-  pub detail: Option<String>,
+  #[serde(with = "serde_bytes")]
+  pub detail: Option<Vec<u8>>,
   /// 보너스 여부
   #[serde(rename = "isBonus")]
   pub is_bonus: bool,
diff --git a/src/api/member_account/api.rs b/src/api/member_account/api.rs
index f23c427..c44f8b3 100644
--- a/src/api/member_account/api.rs
+++ b/src/api/member_account/api.rs
@@ -69,7 +69,18 @@ impl Api {
           let balance = r.balance.unwrap_or(0.00);
           let balance_bota = r.balance_bota.unwrap_or(0.00);
           let balance_sum = r.balance_sum.unwrap_or(0.00);
-          let companies = r.companies;
+          let companies = match r.companies {
+            Some(v) => match std::str::from_utf8(v.as_slice()) {
+              Ok(v) => Some(v.to_string()),
+              Err(e) => {
+                return Err(Error {
+                  code: -1,
+                  msg: Some(e.to_string()),
+                });
+              }
+            },
+            None => None,
+          };
 
           Ok(models::GetBalanceForUserResponse {
             balance,
diff --git a/src/api/member_account/models.rs b/src/api/member_account/models.rs
index 4c164f7..03c5e2e 100644
--- a/src/api/member_account/models.rs
+++ b/src/api/member_account/models.rs
@@ -13,8 +13,8 @@ pub struct _GetBalanceForUserResponse {
   pub balance_bota: Option<f64>,
   #[serde(rename = "balanceSum")]
   pub balance_sum: Option<f64>,
-  #[serde(skip_deserializing)]
-  pub companies: Option<String>,
+  #[serde(with = "serde_bytes")]
+  pub companies: Option<Vec<u8>>,
 }
 
 #[derive(Serialize, Deserialize, Debug)]
diff --git a/src/synchronizations/betting_history/synchronizer.rs b/src/synchronizations/betting_history/synchronizer.rs
index 8f87c1d..f45319c 100644
--- a/src/synchronizations/betting_history/synchronizer.rs
+++ b/src/synchronizations/betting_history/synchronizer.rs
@@ -137,7 +137,18 @@ impl Synchronizer {
             });
           }
         };
-        let detail = b.detail;
+        let detail = match b.detail {
+          Some(v) => match std::str::from_utf8(v.as_slice()) {
+            Ok(v) => Some(v.to_string()),
+            Err(e) => {
+              return Err(api::core::models::Error {
+                code: -1,
+                msg: Some(format!("std::str::from_utf8 error: {}", e)),
+              });
+            }
+          },
+          None => None,
+        };
 
         new_betting_history.push(repositories::betting_history::models::NewBettingHistory {
           id: b._id,