diff --git a/src/config.ts b/src/config.ts
index e025999..892f977 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -66,7 +66,9 @@ const configSchema = Type.Object(
      *
      * E.g. Date will be of Type String when enabled.
      */
-    useJsonTypes: Type.Boolean({ default: false }),
+    useJsonTypes: Type.Union([Type.Boolean(), Type.Literal("transformer")], {
+      default: false,
+    }),
     /**
      * What file extension, if any, to add to src file imports. Set to ".js" to support nodenext module resolution
      */
@@ -76,7 +78,7 @@ const configSchema = Type.Object(
      */
     exportedTypePrefix: Type.String({ default: "" }),
   },
-  { additionalProperties: false },
+  { additionalProperties: false }
 );
 
 // biome-ignore lint/suspicious/noExplicitAny: we want to set the default value
diff --git a/src/generators/primitiveField.ts b/src/generators/primitiveField.ts
index 9772301..20d3efa 100644
--- a/src/generators/primitiveField.ts
+++ b/src/generators/primitiveField.ts
@@ -15,7 +15,7 @@ const PrimitiveFields = [
 export type PrimitivePrismaFieldType = (typeof PrimitiveFields)[number];
 
 export function isPrimitivePrismaFieldType(
-  str: string,
+  str: string
 ): str is PrimitivePrismaFieldType {
   // biome-ignore lint/suspicious/noExplicitAny: we want to check if the string is a valid primitive field
   return PrimitiveFields.includes(str as any);
@@ -42,10 +42,20 @@ export function stringifyPrimitiveType({
 
   if (["DateTime"].includes(fieldType)) {
     const config = getConfig();
-    if (config.useJsonTypes) {
+    if (config.useJsonTypes === "transformer") {
       return `${getConfig().transformDateName}(${options})`;
     }
 
+    if (config.useJsonTypes) {
+      let opts = options;
+      if (opts.includes("{") && opts.includes("}")) {
+        opts = opts.replace("{", "{ format: 'date-time', ");
+      } else {
+        opts = `{ format: 'date-time' }`;
+      }
+      return `${config.typeboxImportVariableName}.String(${opts})`;
+    }
+
     return `${getConfig().typeboxImportVariableName}.Date(${options})`;
   }