diff --git a/http4s/src/main/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorService.scala b/http4s/src/main/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorService.scala
index bfde83638..407b1856f 100644
--- a/http4s/src/main/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorService.scala
+++ b/http4s/src/main/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorService.scala
@@ -116,7 +116,7 @@ class CollectorService[F[_]: Sync](
     config.paths.getOrElse(original, original)
   }
 
-  override def preflightResponse(req: Request[F]): F[Response[F]] = Sync[F].delay {
+  override def preflightResponse(req: Request[F]): F[Response[F]] = Sync[F].pure {
     Response[F](
       headers = Headers(
         accessControlAllowOriginHeader(req),
diff --git a/http4s/src/test/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorRoutesSpec.scala b/http4s/src/test/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorRoutesSpec.scala
index 26a4ddea7..94682e3e8 100644
--- a/http4s/src/test/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorRoutesSpec.scala
+++ b/http4s/src/test/scala/com.snowplowanalytics.snowplow.collectors.scalastream/CollectorRoutesSpec.scala
@@ -29,7 +29,7 @@ class CollectorRoutesSpec extends Specification {
     def getCookieCalls: List[CookieParams] = cookieCalls.toList
 
     override def preflightResponse(req: Request[IO]): IO[Response[IO]] =
-      IO.delay(Response[IO](status = Ok, body = Stream.emit("preflight response").through(text.utf8.encode)))
+      IO.pure(Response[IO](status = Ok, body = Stream.emit("preflight response").through(text.utf8.encode)))
 
     override def cookie(
       body: IO[Option[String]],