diff --git a/Cargo.toml b/Cargo.toml
index 08e0190..521d257 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ log = "0.4"
 time = { version = "0.3", features = ["parsing", "formatting", "macros"] }
 socket2 = { version = "0.5.3", optional = true, features = ["all"] }
 
-h2 = { version = "0.3.17", default-features = false, optional = true }
+h2 = { version = "0.4.0", default-features = false, optional = true }
 http = "0.2"
 mime = "0.3"
 mime_guess = "2"