diff --git a/Cargo.lock b/Cargo.lock
index 79477a3..b4b7a34 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2216,6 +2216,7 @@ dependencies = [
  "sea-orm",
  "secrecy",
  "serde",
+ "serde_json",
  "serial_test",
  "thiserror",
  "tokio",
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 4e94eec..8bc4e4b 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -11,6 +11,7 @@ portfolio-entity = { path = "../entity" }
 
 # serde
 serde = { version = "^1.0", features = ["derive"] }
+serde_json = "1.0"
 
 # csv
 csv = "^1.1"