diff --git a/Cargo.toml b/Cargo.toml
index 147f9a1..c3c1a3a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ categories = ["web-programming", "encoding", "data-structures"]
 name = "cloudevents"
 
 [features]
-actix = ["actix-web", "async-trait", "bytes", "futures"]
+actix = ["actix-web", "async-trait", "bytes", "futures", "http"]
 reqwest = ["reqwest-lib", "async-trait", "bytes"]
 rdkafka = ["rdkafka-lib", "bytes", "futures"]
 warp = ["warp-lib", "bytes", "http", "hyper"]
diff --git a/src/binding/actix/headers.rs b/src/binding/actix/headers.rs
deleted file mode 100644
index 867aeec..0000000
--- a/src/binding/actix/headers.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-macro_rules! str_to_header_value {
-    ($header_value:expr) => {
-        HeaderValue::from_str(&$header_value.to_string()).map_err(|e| {
-            crate::message::Error::Other {
-                source: Box::new(e),
-            }
-        })
-    };
-}
diff --git a/src/binding/actix/mod.rs b/src/binding/actix/mod.rs
index 85039f3..8e33852 100644
--- a/src/binding/actix/mod.rs
+++ b/src/binding/actix/mod.rs
@@ -41,8 +41,6 @@
 
 #![deny(broken_intra_doc_links)]
 
-#[macro_use]
-mod headers;
 mod server_request;
 mod server_response;
 
diff --git a/src/binding/actix/server_response.rs b/src/binding/actix/server_response.rs
index 39217e4..623e039 100644
--- a/src/binding/actix/server_response.rs
+++ b/src/binding/actix/server_response.rs
@@ -1,15 +1,17 @@
-use crate::binding::{
-    attribute_header,
-    http::{PREFIX, SPEC_VERSION_HEADER},
-    CLOUDEVENTS_JSON_HEADER,
-};
 use crate::event::SpecVersion;
 use crate::message::{
     BinaryDeserializer, BinarySerializer, MessageAttributeValue, Result, StructuredSerializer,
 };
 use crate::Event;
+use crate::{
+    binding::{
+        http::{header_prefix, SPEC_VERSION_HEADER},
+        CLOUDEVENTS_JSON_HEADER,
+    },
+    str_to_header_value,
+};
 use actix_web::dev::HttpResponseBuilder;
-use actix_web::http::{HeaderValue, StatusCode};
+use actix_web::http::StatusCode;
 use actix_web::HttpResponse;
 use async_trait::async_trait;
 use futures::future::LocalBoxFuture;
@@ -34,18 +36,14 @@ impl BinarySerializer<HttpResponse> for HttpResponseSerializer {
     }
 
     fn set_attribute(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        self.builder.set_header(
-            &attribute_header(PREFIX, name),
-            str_to_header_value!(value)?,
-        );
+        self.builder
+            .set_header(&header_prefix(name), str_to_header_value!(value)?);
         Ok(self)
     }
 
     fn set_extension(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        self.builder.set_header(
-            &attribute_header(PREFIX, name),
-            str_to_header_value!(value)?,
-        );
+        self.builder
+            .set_header(&header_prefix(name), str_to_header_value!(value)?);
         Ok(self)
     }
 
diff --git a/src/binding/mod.rs b/src/binding/mod.rs
index 486907e..36c0d36 100644
--- a/src/binding/mod.rs
+++ b/src/binding/mod.rs
@@ -12,18 +12,35 @@ pub mod warp;
 #[cfg(feature = "rdkafka")]
 pub(crate) mod kafka {
     pub static SPEC_VERSION_HEADER: &str = "ce_specversion";
-    pub static PREFIX: &str = "ce_";
+    pub fn header_prefix(name: &str) -> String {
+        super::header_prefix("ce_", name)
+    }
 }
+
 #[cfg(any(feature = "actix", feature = "warp", feature = "reqwest"))]
 pub(crate) mod http {
     pub static SPEC_VERSION_HEADER: &str = "ce-specversion";
-    pub static PREFIX: &str = "ce-";
+    pub fn header_prefix(name: &str) -> String {
+        super::header_prefix("ce-", name)
+    }
+}
+
+#[cfg(any(feature = "actix", feature = "warp"))]
+#[macro_export]
+macro_rules! str_to_header_value {
+    ($header_value:expr) => {
+        http::header::HeaderValue::from_str(&$header_value.to_string()).map_err(|e| {
+            crate::message::Error::Other {
+                source: Box::new(e),
+            }
+        })
+    };
 }
 
 pub(crate) static CLOUDEVENTS_JSON_HEADER: &str = "application/cloudevents+json";
 pub(crate) static CONTENT_TYPE: &str = "content-type";
 
-pub(crate) fn attribute_header(prefix: &str, name: &str) -> String {
+fn header_prefix(prefix: &str, name: &str) -> String {
     if name == "datacontenttype" {
         CONTENT_TYPE.to_string()
     } else {
diff --git a/src/binding/rdkafka/kafka_producer_record.rs b/src/binding/rdkafka/kafka_producer_record.rs
index 0732395..046e953 100644
--- a/src/binding/rdkafka/kafka_producer_record.rs
+++ b/src/binding/rdkafka/kafka_producer_record.rs
@@ -1,8 +1,8 @@
 use rdkafka_lib as rdkafka;
 
-use crate::binding::kafka::PREFIX;
 use crate::binding::{
-    attribute_header, kafka::SPEC_VERSION_HEADER, CLOUDEVENTS_JSON_HEADER, CONTENT_TYPE,
+    kafka::{header_prefix, SPEC_VERSION_HEADER},
+    CLOUDEVENTS_JSON_HEADER, CONTENT_TYPE,
 };
 use crate::event::SpecVersion;
 use crate::message::{
@@ -51,13 +51,13 @@ impl BinarySerializer<MessageRecord> for MessageRecord {
     }
 
     fn set_attribute(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        let key = &attribute_header(PREFIX, name);
+        let key = &header_prefix(name);
         self.headers = self.headers.add(key, &value.to_string());
         Ok(self)
     }
 
     fn set_extension(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        let key = &attribute_header(PREFIX, name);
+        let key = &header_prefix(name);
         self.headers = self.headers.add(key, &value.to_string());
         Ok(self)
     }
diff --git a/src/binding/reqwest/client_request.rs b/src/binding/reqwest/client_request.rs
index 79b9a49..347a255 100644
--- a/src/binding/reqwest/client_request.rs
+++ b/src/binding/reqwest/client_request.rs
@@ -1,7 +1,9 @@
 use reqwest_lib as reqwest;
 
-use crate::binding::http::PREFIX;
-use crate::binding::{attribute_header, http::SPEC_VERSION_HEADER, CLOUDEVENTS_JSON_HEADER};
+use crate::binding::{
+    http::{header_prefix, SPEC_VERSION_HEADER},
+    CLOUDEVENTS_JSON_HEADER,
+};
 use crate::event::SpecVersion;
 use crate::message::{
     BinaryDeserializer, BinarySerializer, MessageAttributeValue, Result, StructuredSerializer,
@@ -27,13 +29,13 @@ impl BinarySerializer<RequestBuilder> for RequestSerializer {
     }
 
     fn set_attribute(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        let key = &attribute_header(PREFIX, name);
+        let key = &header_prefix(name);
         self.req = self.req.header(key, value.to_string());
         Ok(self)
     }
 
     fn set_extension(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        let key = &attribute_header(PREFIX, name);
+        let key = &header_prefix(name);
         self.req = self.req.header(key, value.to_string());
         Ok(self)
     }
diff --git a/src/binding/warp/server_response.rs b/src/binding/warp/server_response.rs
index 49af04e..3062234 100644
--- a/src/binding/warp/server_response.rs
+++ b/src/binding/warp/server_response.rs
@@ -1,20 +1,20 @@
 use warp_lib as warp;
 
-use crate::binding::http::PREFIX;
-use crate::binding::{attribute_header, http::SPEC_VERSION_HEADER, CLOUDEVENTS_JSON_HEADER};
+use crate::binding::{
+    http::{header_prefix, SPEC_VERSION_HEADER},
+    CLOUDEVENTS_JSON_HEADER,
+};
 use crate::event::SpecVersion;
 use crate::message::{
     BinaryDeserializer, BinarySerializer, Error, MessageAttributeValue, Result,
     StructuredSerializer,
 };
-use crate::Event;
+use crate::{str_to_header_value, Event};
 
-use warp::http::HeaderValue;
 use warp::hyper::Body;
 use warp::reply::Response;
 
 use http::response::Builder;
-use std::convert::TryFrom;
 
 pub struct ResponseSerializer {
     builder: Builder,
@@ -30,38 +30,23 @@ impl ResponseSerializer {
 
 impl BinarySerializer<Response> for ResponseSerializer {
     fn set_spec_version(mut self, spec_version: SpecVersion) -> Result<Self> {
-        self.builder = self.builder.header(
-            SPEC_VERSION_HEADER,
-            HeaderValue::try_from(spec_version.to_string()).map_err(|e| {
-                crate::message::Error::Other {
-                    source: Box::new(e),
-                }
-            })?,
-        );
+        self.builder = self
+            .builder
+            .header(SPEC_VERSION_HEADER, str_to_header_value!(spec_version)?);
         Ok(self)
     }
 
     fn set_attribute(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        self.builder = self.builder.header(
-            &attribute_header(PREFIX, name),
-            HeaderValue::try_from(&value.to_string()).map_err(|e| {
-                crate::message::Error::Other {
-                    source: Box::new(e),
-                }
-            })?,
-        );
+        self.builder = self
+            .builder
+            .header(&header_prefix(name), str_to_header_value!(value)?);
         Ok(self)
     }
 
     fn set_extension(mut self, name: &str, value: MessageAttributeValue) -> Result<Self> {
-        self.builder = self.builder.header(
-            &attribute_header(PREFIX, name),
-            HeaderValue::try_from(&value.to_string()).map_err(|e| {
-                crate::message::Error::Other {
-                    source: Box::new(e),
-                }
-            })?,
-        );
+        self.builder = self
+            .builder
+            .header(&header_prefix(name), str_to_header_value!(value)?);
         Ok(self)
     }