diff --git a/integrations/actix-web/Cargo.toml b/integrations/actix-web/Cargo.toml
index 8d6135ab..3707b25d 100644
--- a/integrations/actix-web/Cargo.toml
+++ b/integrations/actix-web/Cargo.toml
@@ -21,6 +21,7 @@ actix-web-actors = "4.0.0-beta.9"
 async-channel = "1.6.1"
 futures-util = { version = "0.3.0", default-features = false }
 serde_json = "1.0.64"
+serde_cbor = "0.11"
 serde_urlencoded = "0.7.0"
 futures-channel = "0.3.13"
 thiserror = "1.0.30"
diff --git a/integrations/actix-web/src/request.rs b/integrations/actix-web/src/request.rs
index 70cdc7a5..04c4c60c 100644
--- a/integrations/actix-web/src/request.rs
+++ b/integrations/actix-web/src/request.rs
@@ -156,17 +156,28 @@ impl From<async_graphql::BatchResponse> for GraphQLResponse {
 impl Responder for GraphQLResponse {
     type Body = BoxBody;
 
-    fn respond_to(self, _req: &HttpRequest) -> HttpResponse {
+    fn respond_to(self, req: &HttpRequest) -> HttpResponse {
         let mut res = HttpResponse::build(StatusCode::OK);
-        res.content_type("application/json");
         if self.0.is_ok() {
             if let Some(cache_control) = self.0.cache_control().value() {
-                res.append_header(("cache-control", cache_control));
+                res.append_header((http::header::CACHE_CONTROL, cache_control));
             }
         }
         for (name, value) in self.0.http_headers() {
             res.append_header((name, value));
         }
-        res.body(serde_json::to_string(&self.0).unwrap())
+        let accept = req
+            .headers()
+            .get(http::header::ACCEPT)
+            .and_then(|val| val.to_str().ok());
+        // TODO: Error handling
+        // Neither of these branches should potentially panic.
+        if accept == Some("application/cbor") {
+            res.content_type("application/cbor");
+            res.body(serde_cbor::to_vec(&self.0).unwrap())
+        } else {
+            res.content_type("application/json");
+            res.body(serde_json::to_vec(&self.0).unwrap())
+        }
     }
 }