diff --git a/Cargo.toml b/Cargo.toml
index 6670ac94..97c6ab32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,6 +43,7 @@ pam-sys = "0.5"
 pam = "0.7"
 zstd = "0.4"
 xdg = "2.2"
+mio = "0.6"
 
 [replace]
 "zstd-sys:1.4.8" = { path = "zstd-sys" }