diff --git a/Cargo.lock b/Cargo.lock
index 027ca82..03dcfad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2060,6 +2060,7 @@ dependencies = [
  "dotenv",
  "futures",
  "infer",
+ "once_cell",
  "portfolio-entity",
  "rand 0.8.5",
  "sea-orm",
diff --git a/core/Cargo.toml b/core/Cargo.toml
index a4ec0d4..56c1c6d 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -13,7 +13,7 @@ portfolio-entity = { path = "../entity" }
 serde = { version = "^1.0", features = ["derive"] }
 
 # csv
-csv = "^1.1"
+csv = "1.1"
 
 # error
 
@@ -23,7 +23,7 @@ thiserror = "^1.0"
 dotenv = "^0.15"
 
 # async
-tokio = "^1.22"
+tokio = "^1.21"
 futures = "^0.3"
 async-compat = "^0.2"
 
@@ -49,6 +49,7 @@ features = [
 ]
 
 [dev-dependencies]
-tokio = { version = "^1.22", features = ["macros"] }
+tokio = { version = "^1.21", features = ["macros"] }
 async-tempfile = "^0.2"
 serial_test = "0.9.0"
+once_cell = "1.9.0"
\ No newline at end of file