diff --git a/api/Cargo.toml b/api/Cargo.toml
index 201451b..dd35d21 100644
--- a/api/Cargo.toml
+++ b/api/Cargo.toml
@@ -20,8 +20,8 @@ serde_json = { version = "^1.0" }
 chrono = "^0.4"
 
 # logging
-log = "0.4"
-fern = "0.6"
+log = "^0.4"
+fern = "^0.6"
 
 portfolio-entity = { path = "../entity" }
 portfolio-migration = { path = "../migration" }
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 94ae6e3..be3962a 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -41,8 +41,8 @@ secrecy = { version = "^0.8" }
 base64 = "^0.13"
 
 # logging
-log = "0.4"
-fern = "0.6"
+log = "^0.4"
+fern = "^0.6"
 
 [dependencies.sea-orm]
 version = "^0.10"