diff --git a/.travis.yml b/.travis.yml
index 7560022..f751aa5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: rust
 sudo: false
 rust:
-  - nightly-2019-06-27
+  - nightly-2019-07-06
 
 os:
   - linux
@@ -12,7 +12,7 @@ script:
 matrix:
   include:
     - os: linux
-      rust: nightly-2019-06-27
+      rust: nightly-2019-07-06
       sudo: required
       name: coverage
       addons: # needed for `cargo install cargo-travis`
diff --git a/Cargo.toml b/Cargo.toml
index 34e0850..3190d22 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,5 +14,5 @@ edition = "2018"
 pin-utils = "=0.1.0-alpha.4"
 
 [dependencies.futures]
-version = "=0.3.0-alpha.16"
+version = "=0.3.0-alpha.17"
 package = "futures-preview"
diff --git a/README.md b/README.md
index 1864915..88c4080 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ like `FutureExt::map`, `TryFutureExt::and_then`...
 
 # Requirements
 
-Rust nightly-2019-06-27 for async_await, await_macro...
+Rust nightly-2019-07-06 for async_await, await_macro...
 
 # State
 
diff --git a/src/lib.rs b/src/lib.rs
index 6b21e35..aa29d3d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(async_await, gen_future, generators)]
+#![feature(async_await, async_closure, gen_future, generators)]
 
 pub mod future;
 pub mod stream;