diff --git a/modules/openapi-generator/src/main/resources/typescript-node/models.mustache b/modules/openapi-generator/src/main/resources/typescript-node/models.mustache
index 96b3fb2b826..c19bdf2153a 100644
--- a/modules/openapi-generator/src/main/resources/typescript-node/models.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-node/models.mustache
@@ -151,6 +151,9 @@ export class ObjectSerializer {
             }
             return transformedData;
         } else if (type === "Date") {
+            if (typeof data === "string") {
+                return new Date(data).toISOString();
+            }
             return data.toISOString();
         } else {
             if (enumsMap[type]) {