diff --git a/examples/users.rs b/examples/users.rs
index fd8caac..077ef41 100644
--- a/examples/users.rs
+++ b/examples/users.rs
@@ -127,7 +127,7 @@ fn main()
 	);
 
 	gotham::start(ADDR, build_router(chain, pipelines, |route| {
-		route.with_openapi("Users Example", "0.0.1", |mut route| {
+		route.with_openapi("Users Example", "0.0.1", ADDR, |mut route| {
 			route.resource::<Users, _>("users");
 			route.get_openapi("openapi");
 		});
diff --git a/src/openapi.rs b/src/openapi.rs
index c67f518..7d36973 100644
--- a/src/openapi.rs
+++ b/src/openapi.rs
@@ -14,7 +14,7 @@ use gotham::{
 use indexmap::IndexMap;
 use log::error;
 use mime::{APPLICATION_JSON, TEXT_PLAIN};
-use openapiv3::{MediaType, OpenAPI, Operation, PathItem, Paths, ReferenceOr, ReferenceOr::Item, Response, Responses, StatusCode};
+use openapiv3::{MediaType, OpenAPI, Operation, PathItem, Paths, ReferenceOr, ReferenceOr::Item, Response, Responses, Server, StatusCode};
 use serde::de::DeserializeOwned;
 use std::panic::RefUnwindSafe;
 
@@ -22,7 +22,7 @@ pub struct OpenapiRouter(OpenAPI);
 
 impl OpenapiRouter
 {
-	pub fn new<Title : ToString, Version : ToString>(title : Title, version : Version) -> Self
+	pub fn new<Title : ToString, Version : ToString, Url : ToString>(title : Title, version : Version, server_url : Url) -> Self
 	{
 		Self(OpenAPI {
 			openapi: "3.0.2".to_string(),
@@ -34,7 +34,11 @@ impl OpenapiRouter
 				license: None,
 				version: version.to_string()
 			},
-			servers: Vec::new(),
+			servers: vec![Server {
+				url: server_url.to_string(),
+				description: None,
+				variables: None
+			}],
 			paths: Paths::new(),
 			components: None,
 			security: Vec::new(),
diff --git a/src/routing.rs b/src/routing.rs
index ae073a9..a7ea592 100644
--- a/src/routing.rs
+++ b/src/routing.rs
@@ -34,11 +34,12 @@ struct PathExtractor<ID : RefUnwindSafe + Send + 'static>
 #[cfg(feature = "openapi")]
 pub trait WithOpenapi<D>
 {
-	fn with_openapi<F, Title, Version>(&mut self, title : Title, version : Version, block : F)
+	fn with_openapi<F, Title, Version, Url>(&mut self, title : Title, version : Version, server_url : Url, block : F)
 	where
 		F : FnOnce((&mut D, &mut OpenapiRouter)),
 		Title : ToString,
-		Version : ToString;
+		Version : ToString,
+		Url : ToString;
 }
 
 /// This trait adds the `resource` method to gotham's routing. It allows you to register
@@ -235,13 +236,14 @@ macro_rules! implDrawResourceRoutes {
 			C : PipelineHandleChain<P> + Copy + Send + Sync + 'static,
 			P : RefUnwindSafe + Send + Sync + 'static
 		{
-			fn with_openapi<F, Title, Version>(&mut self, title : Title, version : Version, block : F)
+			fn with_openapi<F, Title, Version, Url>(&mut self, title : Title, version : Version, server_url : Url, block : F)
 			where
 				F : FnOnce((&mut Self, &mut OpenapiRouter)),
 				Title : ToString,
-				Version : ToString
+				Version : ToString,
+				Url : ToString
 			{
-				let mut router = OpenapiRouter::new(title, version);
+				let mut router = OpenapiRouter::new(title, version, server_url);
 				block((self, &mut router));
 			}
 		}