diff --git a/Cargo.toml b/Cargo.toml
index b6b6511..074f60b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ rand = "0.6.5"
 rand_hc = "0.1.0"
 rand_core = "0.4.0"
 lru_time_cache = "0.9.0"
-structopt = "0.2.13"
+structopt = "0.3.7"
 itertools = "0.8.0"
 net2 = "0.2.33"
 clone_all = "0.1.1"