Bump dep on libc
diff --git a/Cargo.toml b/Cargo.toml
index 4d722ba..93fa202 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@
 keywords = ["random", "rng"]
 
 [dependencies]
-libc = "0.1.1"
+libc = "0.2"
 winapi = "0.2"
 advapi32-sys = "0.1.2"