diff --git a/Cargo.toml b/Cargo.toml
index 47d2e31..a3937b8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-flexi_logger = { version = "0.30", features = ["async"] }
+# new flexi_logger failed on rustc 1.75
+flexi_logger = { version = "0.27", features = ["async"] }
 protobuf = { version = "3.7", features = ["with-bytes"] }
 tokio = { version = "1.44", features = ["full"] }
 tokio-util = { version = "0.7", features = ["full"] }