diff --git a/core-foundation/Cargo.toml b/core-foundation/Cargo.toml
index 9f07bae..e20a0b7 100644
--- a/core-foundation/Cargo.toml
+++ b/core-foundation/Cargo.toml
@@ -8,4 +8,4 @@ authors = ["The Servo Project Developers"]
 license = "MIT / Apache-2.0"
 
 [dependencies]
-libc = "*"
+libc = "0.1"