diff --git a/CHANGES.md b/CHANGES.md
index df577a99..f0f7cd7e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## 0.6.4 (2018-05-11)
+
+* Fix segfault in ServerSettings::get_response_builder()
+
+
 ## 0.6.3 (2018-05-10)
 
 * Add `Router::with_async()` method for async handler registration.
diff --git a/Cargo.toml b/Cargo.toml
index 24a50051..6fd07355 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "actix-web"
-version = "0.6.3"
+version = "0.6.4"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
 description = "Actix web is a simple, pragmatic and extremely fast web framework for Rust."
 readme = "README.md"
diff --git a/src/server/settings.rs b/src/server/settings.rs
index cd17681b..f75033c1 100644
--- a/src/server/settings.rs
+++ b/src/server/settings.rs
@@ -16,7 +16,6 @@ use body::Body;
 use httpresponse::{HttpResponse, HttpResponseBuilder, HttpResponsePool};
 
 /// Various server settings
-#[derive(Clone)]
 pub struct ServerSettings {
     addr: Option<net::SocketAddr>,
     secure: bool,
@@ -28,6 +27,18 @@ pub struct ServerSettings {
 unsafe impl Sync for ServerSettings {}
 unsafe impl Send for ServerSettings {}
 
+impl Clone for ServerSettings {
+    fn clone(&self) -> Self {
+        ServerSettings {
+            addr: self.addr,
+            secure: self.secure,
+            host: self.host.clone(),
+            cpu_pool: self.cpu_pool.clone(),
+            responses: HttpResponsePool::pool(),
+        }
+    }
+}
+
 struct InnerCpuPool {
     cpu_pool: UnsafeCell<Option<CpuPool>>,
 }