diff --git a/darwin-libproc/Cargo.toml b/darwin-libproc/Cargo.toml
index 028541d..c5830c7 100644
--- a/darwin-libproc/Cargo.toml
+++ b/darwin-libproc/Cargo.toml
@@ -16,5 +16,5 @@ maintenance = { status = "experimental" }
 
 [dependencies]
 darwin-libproc-sys = { version = "0.2", path = "../darwin-libproc-sys" }
-libc = "~0.2"
-memchr = "~2.3"
+libc = "0.2"
+memchr = "2.3"