diff --git a/actix-codec/src/lib.rs b/actix-codec/src/lib.rs
index 5842fa7b..6914b306 100644
--- a/actix-codec/src/lib.rs
+++ b/actix-codec/src/lib.rs
@@ -7,8 +7,8 @@
 //! [`Sink`]: futures_sink::Sink
 //! [`Stream`]: futures_core::Stream
 
-#![deny(rust_2018_idioms, nonstandard_style, future_incompatible)]
-#![warn(missing_docs)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(future_incompatible, missing_docs)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
diff --git a/actix-macros/src/lib.rs b/actix-macros/src/lib.rs
index be69b7b0..284f6920 100644
--- a/actix-macros/src/lib.rs
+++ b/actix-macros/src/lib.rs
@@ -9,6 +9,7 @@
 //! See docs for the [`#[test]`](macro@test) macro.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(future_incompatible)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
diff --git a/actix-rt/src/lib.rs b/actix-rt/src/lib.rs
index 85062e80..7fb2b632 100644
--- a/actix-rt/src/lib.rs
+++ b/actix-rt/src/lib.rs
@@ -41,7 +41,7 @@
 //! In particular, when running a `System`, only `System::block_on` is supported.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 #![allow(clippy::type_complexity)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
diff --git a/actix-server/src/lib.rs b/actix-server/src/lib.rs
index 6ac8ba7e..f9b1a992 100644
--- a/actix-server/src/lib.rs
+++ b/actix-server/src/lib.rs
@@ -1,6 +1,7 @@
 //! General purpose TCP server.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(future_incompatible)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
diff --git a/actix-service/src/lib.rs b/actix-service/src/lib.rs
index 12de9f66..96a6b164 100644
--- a/actix-service/src/lib.rs
+++ b/actix-service/src/lib.rs
@@ -1,8 +1,8 @@
 //! See [`Service`] docs for information on this crate's foundational trait.
 
 #![no_std]
-#![deny(rust_2018_idioms, nonstandard_style, future_incompatible)]
-#![warn(missing_docs)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(future_incompatible, missing_docs)]
 #![allow(clippy::type_complexity)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
diff --git a/actix-tls/src/lib.rs b/actix-tls/src/lib.rs
index 68ca0e35..39714dca 100644
--- a/actix-tls/src/lib.rs
+++ b/actix-tls/src/lib.rs
@@ -1,9 +1,10 @@
 //! TLS acceptor and connector services for the Actix ecosystem.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+// enable unstable doc_cfg feature only on on docs.rs where nightly compiler is used
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
 #[cfg(feature = "openssl")]
diff --git a/actix-tracing/src/lib.rs b/actix-tracing/src/lib.rs
index fcc1488d..a12f6d05 100644
--- a/actix-tracing/src/lib.rs
+++ b/actix-tracing/src/lib.rs
@@ -1,6 +1,7 @@
 //! Actix tracing - support for tokio tracing with Actix services.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(future_incompatible)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
diff --git a/actix-utils/src/lib.rs b/actix-utils/src/lib.rs
index 6d431d52..b02687cb 100644
--- a/actix-utils/src/lib.rs
+++ b/actix-utils/src/lib.rs
@@ -1,7 +1,7 @@
 //! Various utilities used in the Actix ecosystem.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
diff --git a/bytestring/src/lib.rs b/bytestring/src/lib.rs
index ecf21c95..7ab5a291 100644
--- a/bytestring/src/lib.rs
+++ b/bytestring/src/lib.rs
@@ -2,7 +2,7 @@
 
 #![no_std]
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 
 extern crate alloc;
 
diff --git a/local-channel/src/lib.rs b/local-channel/src/lib.rs
index 98234eda..e3f493ad 100644
--- a/local-channel/src/lib.rs
+++ b/local-channel/src/lib.rs
@@ -1,7 +1,7 @@
 //! Non-thread-safe channels.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 
 extern crate alloc;
 
diff --git a/local-waker/src/lib.rs b/local-waker/src/lib.rs
index b1911651..6a6a5558 100644
--- a/local-waker/src/lib.rs
+++ b/local-waker/src/lib.rs
@@ -4,7 +4,7 @@
 
 #![no_std]
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![warn(missing_docs)]
+#![warn(future_incompatible, missing_docs)]
 
 use core::{cell::Cell, fmt, marker::PhantomData, task::Waker};
 
diff --git a/rustfmt.toml b/rustfmt.toml
index 2e19d167..973e002c 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,5 +1,2 @@
 max_width = 96
 reorder_imports = true
-#wrap_comments = true
-#fn_args_density = "Compressed"
-#use_small_heuristics = false