diff --git a/Cargo.toml b/Cargo.toml
index b40a6bd..203fd0d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ required-features = [ ]
 log = "0.4"
 env_logger = { version = "0.6", default-features = false, features = [ "termcolor", "atty", "humantime" ] }
 clap       = { version = "2.33", optional = true }
-futures    = { version = "0.1", optional = true }
+futures    = { version = "0.3", optional = true }
 tokio-core = { version = "0.1", optional = true }
 hyper      = { version = "0.11", optional = true }
 hyper-tls  = { version = "0.1", optional = true }