diff --git a/backend/middlewares/cors.go b/backend/middlewares/cors.go
new file mode 100644
index 0000000..a6a0f85
--- /dev/null
+++ b/backend/middlewares/cors.go
@@ -0,0 +1,17 @@
+package middlewares
+
+import (
+	"net/http"
+)
+
+func Cors(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		origin := request.Header.Get("Origin")
+
+		switch origin {
+		case "http://localhost:5173", "http://localhost", "https://alai.cromer.cl":
+			writer.Header().Set("Access-Control-Allow-Origin", origin)
+			writer.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		}
+	})
+}
diff --git a/backend/routes/router.go b/backend/routes/router.go
index 2b89b17..e790ded 100644
--- a/backend/routes/router.go
+++ b/backend/routes/router.go
@@ -9,6 +9,7 @@ import (
 	"os/signal"
 	"syscall"
 
+	"git.cromer.cl/Proyecto-Titulo/alai-server/backend/middlewares"
 	"github.com/gorilla/handlers"
 	"github.com/julienschmidt/httprouter"
 )
@@ -26,6 +27,7 @@ func Initialize() *httprouter.Router {
 func Serve(router *httprouter.Router) {
 	newRouter := handlers.CombinedLoggingHandler(os.Stdout, router)
 	newRouter = handlers.CompressHandler(newRouter)
+	newRouter = middlewares.Cors(newRouter)
 
 	idleConnsClosed := make(chan struct{})