diff --git a/Cargo.toml b/Cargo.toml
index aa677df..514f26b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ unstable = []
 
 [dependencies]
 num-traits = {version = "0.1.32", default-features = false}
-log = "0.3.1"
+log = "0.4"
 serde = "1.0"
 
 [dev-dependencies]