diff --git a/Cargo.toml b/Cargo.toml
index 365c1ee..562406e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ path = "src/main.rs"
 errno = "0.2"
 error-chain = "0.10"
 ioctl-sys = "0.5.2"
-libc = "0.2"
+libc = "0.2.29"
 derive_builder = "0.4"
 ipnetwork = "0.12"