diff --git a/core/Cargo.toml b/core/Cargo.toml
index fceda356..4f360dab 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -50,7 +50,7 @@ rand = "0.8"
 vergen = "3.0.4"
 
 [dev-dependencies]
-env_logger = "*"
+env_logger = "0.8"
 tokio = {version = "1.0", features = ["macros"] }
 
 [features]