diff --git a/darwin-libproc/Cargo.toml b/darwin-libproc/Cargo.toml
index 028541d..7c60d13 100644
--- a/darwin-libproc/Cargo.toml
+++ b/darwin-libproc/Cargo.toml
@@ -17,4 +17,4 @@ maintenance = { status = "experimental" }
 [dependencies]
 darwin-libproc-sys = { version = "0.2", path = "../darwin-libproc-sys" }
 libc = "~0.2"
-memchr = "~2.3"
+memchr = "^2.6"