diff --git a/actix-cors/Cargo.toml b/actix-cors/Cargo.toml
index 6d2469a8d..e779c0057 100644
--- a/actix-cors/Cargo.toml
+++ b/actix-cors/Cargo.toml
@@ -29,7 +29,6 @@ once_cell = "1"
 tinyvec = { version = "1", features = ["alloc"] }
 
 [dev-dependencies]
-actix-service = "2.0.0-beta.5"
 actix-rt = "2"
 pretty_env_logger = "0.4"
 regex = "1.4"
diff --git a/actix-cors/README.md b/actix-cors/README.md
index 4f0492c8d..3204a89fd 100644
--- a/actix-cors/README.md
+++ b/actix-cors/README.md
@@ -11,5 +11,4 @@
 
 - [API Documentation](https://docs.rs/actix-cors)
 - [Example Project](https://github.com/actix/examples/tree/master/security/web-cors)
-- [Chat on Gitter](https://gitter.im/actix/actix-web)
 - Minimum Supported Rust Version (MSRV): 1.46.0
diff --git a/actix-protobuf/Cargo.toml b/actix-protobuf/Cargo.toml
index 31fc6cf00..867b0100e 100644
--- a/actix-protobuf/Cargo.toml
+++ b/actix-protobuf/Cargo.toml
@@ -19,10 +19,10 @@ name = "actix_protobuf"
 path = "src/lib.rs"
 
 [dependencies]
-actix-web = { version = "4.0.0-beta.4", default_features = false }
 actix-rt = "2"
+actix-web = { version = "4.0.0-beta.5", default_features = false }
+derive_more = "0.99.5"
 futures-util = { version = "0.3.7", default-features = false }
-derive_more = "0.99"
 prost = "0.7"
 
 [dev-dependencies]
diff --git a/actix-protobuf/examples/prost-example/Cargo.toml b/actix-protobuf/examples/prost-example/Cargo.toml
index fc21c4e93..7e5728fff 100644
--- a/actix-protobuf/examples/prost-example/Cargo.toml
+++ b/actix-protobuf/examples/prost-example/Cargo.toml
@@ -8,7 +8,7 @@ authors = [
 ]
 
 [dependencies]
-actix-web = "4.0.0-beta.4"
+actix-web = "4.0.0-beta.5"
 actix-protobuf = { path = "../../" }
 
 env_logger = "0.8"
diff --git a/actix-session/src/_error.rs b/actix-session/src/_error.rs
new file mode 100644
index 000000000..b82e4cd3e
--- /dev/null
+++ b/actix-session/src/_error.rs
@@ -0,0 +1,66 @@
+use std::{error::Error as StdError, fmt};
+
+use actix_web::ResponseError;
+use derive_more::Display;
+
+#[derive(Debug, Display)]
+pub(crate) enum InsertErrorKind {
+    #[display(fmt = "{}", _0)]
+    Json(serde_json::Error),
+}
+
+impl Into<actix_web::Error> for InsertErrorKind {
+    fn into(self) -> actix_web::Error {
+        match self {
+            InsertErrorKind::Json(err) => err.into(),
+        }
+    }
+}
+
+/// Error returned by [`Session::insert`][crate::Session::insert]. Allows access to value that
+/// failed to be inserted.
+pub struct InsertError<T> {
+    pub(crate) value: Option<T>,
+    pub(crate) error: InsertErrorKind,
+}
+
+impl<T> InsertError<T> {
+    /// Takes value out of error.
+    ///
+    /// # Panics
+    /// Panics if called more than once.
+    pub fn take_value(&mut self) -> T {
+        self.value
+            .take()
+            .expect("take_value should only be called once")
+    }
+}
+
+impl<T> fmt::Debug for InsertError<T> {
+    fn fmt<'a>(&'a self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut dbg = f.debug_struct("SessionInsertError");
+
+        match &self.value {
+            Some(_) => dbg.field("value", &"Some([value])" as _),
+            None => dbg.field("value", &None::<()> as _),
+        };
+
+        dbg.field("error", &self.error).finish()
+    }
+}
+
+impl<T> fmt::Display for InsertError<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(&self.error, f)
+    }
+}
+
+impl<T: fmt::Debug> StdError for InsertError<T> {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        Some(match &self.error {
+            InsertErrorKind::Json(err) => err,
+        })
+    }
+}
+
+impl<T> ResponseError for InsertError<T> {}
diff --git a/actix-web-httpauth/Cargo.toml b/actix-web-httpauth/Cargo.toml
index db757cf9c..3e6ad6910 100644
--- a/actix-web-httpauth/Cargo.toml
+++ b/actix-web-httpauth/Cargo.toml
@@ -28,4 +28,3 @@ futures-util = { version = "0.3.7", default-features = false }
 [dev-dependencies]
 actix-cors = "1.0.0-beta.1"
 actix-rt = "2"
-actix-service = "2.0.0-beta.5"