diff --git a/Cargo.toml b/Cargo.toml
index bb1977e..cbebf8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,16 +47,16 @@ url = "2.1"
 base64 = "0.10"
 bytes = "0.4"
 encoding_rs = "0.8"
-futures-core-preview = { version = "=0.3.0-alpha.18" }
-futures-util-preview = { version = "=0.3.0-alpha.18" }
-http-body = "=0.2.0-alpha.1"
-hyper = "=0.13.0-alpha.2"
+futures-core-preview = { version = "=0.3.0-alpha.19" }
+futures-util-preview = { version = "=0.3.0-alpha.19" }
+http-body = "=0.2.0-alpha.3"
+hyper = { version = "=0.13.0-alpha.4", default-features = false, features = ["tcp"] }
 log = "0.4"
 mime = "0.3.7"
 mime_guess = "2.0"
 percent-encoding = "2.1"
-tokio = { version = "=0.2.0-alpha.5", default-features = false, features = ["io", "tcp", "timer"] }
-tokio-executor = "=0.2.0-alpha.5"
+tokio = { version = "=0.2.0-alpha.6", default-features = false, features = ["io", "tcp", "timer"] }
+tokio-executor = "=0.2.0-alpha.6"
 uuid = { version = "0.7", features = ["v4"] }
 time = "0.1.42"
 
@@ -68,9 +68,9 @@ serde_urlencoded = "0.6.1"
 # Optional deps...
 
 ## default-tls
-hyper-tls = { version = "=0.4.0-alpha.2", optional = true }
+hyper-tls = { version = "=0.4.0-alpha.4", optional = true }
 native-tls = { version = "0.2", optional = true }
-tokio-tls = { version = "=0.3.0-alpha.5", optional = true }
+tokio-tls = { version = "=0.3.0-alpha.6", optional = true }
 
 ## rustls-tls
 #hyper-rustls = { version = "=0.18.0-alpha.1", optional = true }
@@ -79,14 +79,14 @@ tokio-tls = { version = "=0.3.0-alpha.5", optional = true }
 #webpki-roots = { version = "0.17", optional = true }
 
 ## blocking
-futures-channel-preview = { version = "=0.3.0-alpha.18", optional = true }
+futures-channel-preview = { version = "=0.3.0-alpha.19", optional = true }
 
 ## cookies
 cookie_crate = { version = "0.12", package = "cookie", optional = true }
 cookie_store = { version = "0.9", optional = true }
 
 ## gzip
-async-compression = { version = "0.1.0-alpha.4", default-features = false, features = ["gzip", "stream"], optional = true }
+async-compression = { version = "0.1.0-alpha.5", default-features = false, features = ["gzip", "stream"], optional = true }
 
 ## json
 serde_json = { version = "1.0", optional = true }
@@ -99,7 +99,7 @@ serde_json = { version = "1.0", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 env_logger = "0.6"
-hyper = { version = "=0.13.0-alpha.2", features = ["unstable-stream"] }
+hyper = { version = "=0.13.0-alpha.4", features = ["unstable-stream"] }
 serde = { version = "1.0", features = ["derive"] }
 libflate = "0.1"
 doc-comment = "0.3"
diff --git a/src/async_impl/body.rs b/src/async_impl/body.rs
index b218b99..0ff7fec 100644
--- a/src/async_impl/body.rs
+++ b/src/async_impl/body.rs
@@ -329,6 +329,6 @@ impl HttpBody for WrapHyper {
     }
 
     fn size_hint(&self) -> http_body::SizeHint {
-        self.0.size_hint()
+        HttpBody::size_hint(&self.0)
     }
 }