diff --git a/src/controllers/api/maturePetController.ts b/src/controllers/api/maturePetController.ts
new file mode 100644
index 00000000..1bfb83f6
--- /dev/null
+++ b/src/controllers/api/maturePetController.ts
@@ -0,0 +1,27 @@
+import { getJSONfromString } from "@/src/helpers/stringHelpers";
+import { getInventory } from "@/src/services/inventoryService";
+import { getAccountIdForRequest } from "@/src/services/loginService";
+import { RequestHandler } from "express";
+
+export const maturePetController: RequestHandler = async (req, res) => {
+    const accountId = await getAccountIdForRequest(req);
+    const inventory = await getInventory(accountId, "KubrowPets");
+    const data = getJSONfromString<IMaturePetRequest>(String(req.body));
+    const details = inventory.KubrowPets.id(data.petId)!.Details!;
+    details.IsPuppy = data.revert;
+    await inventory.save();
+    res.json({
+        petId: data.petId,
+        updateCollar: true,
+        armorSkins: ["", "", ""],
+        furPatterns: data.revert
+            ? ["", "", ""]
+            : [details.DominantTraits.FurPattern, details.DominantTraits.FurPattern, details.DominantTraits.FurPattern],
+        unmature: data.revert
+    });
+};
+
+interface IMaturePetRequest {
+    petId: string;
+    revert: boolean;
+}
diff --git a/src/routes/api.ts b/src/routes/api.ts
index 735a48a9..bb1404f5 100644
--- a/src/routes/api.ts
+++ b/src/routes/api.ts
@@ -72,6 +72,7 @@ import { loginRewardsController } from "@/src/controllers/api/loginRewardsContro
 import { loginRewardsSelectionController } from "@/src/controllers/api/loginRewardsSelectionController";
 import { logoutController } from "@/src/controllers/api/logoutController";
 import { marketRecommendationsController } from "@/src/controllers/api/marketRecommendationsController";
+import { maturePetController } from "@/src/controllers/api/maturePetController";
 import { missionInventoryUpdateController } from "@/src/controllers/api/missionInventoryUpdateController";
 import { modularWeaponCraftingController } from "@/src/controllers/api/modularWeaponCraftingController";
 import { modularWeaponSaleController } from "@/src/controllers/api/modularWeaponSaleController";
@@ -219,6 +220,7 @@ apiRouter.post("/inventorySlots.php", inventorySlotsController);
 apiRouter.post("/joinSession.php", joinSessionController);
 apiRouter.post("/login.php", loginController);
 apiRouter.post("/loginRewardsSelection.php", loginRewardsSelectionController);
+apiRouter.post("/maturePet.php", maturePetController);
 apiRouter.post("/missionInventoryUpdate.php", missionInventoryUpdateController);
 apiRouter.post("/modularWeaponCrafting.php", modularWeaponCraftingController);
 apiRouter.post("/modularWeaponSale.php", modularWeaponSaleController);