diff --git a/Cargo.toml b/Cargo.toml
index 4586cea..ca75359 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ license = "MIT/Apache-2.0"
 unstable = []
 
 [dependencies]
-log = "0.3.5"
+log = "0.4"
 serde = "1.0.0"
 
 [dev-dependencies]