diff --git a/package.json b/package.json
index aaee239..468f32e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tn-api.js",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "description": "A Public Template for npm",
   "main": "build/index.js",
   "repository": "https://source.thundernetwork.org/ThunderNetworkRaD/tn-api.js",
diff --git a/src/CreditsManager.ts b/src/CreditsManager.ts
index ebdd929..6d30efb 100644
--- a/src/CreditsManager.ts
+++ b/src/CreditsManager.ts
@@ -66,6 +66,8 @@ export default class CreditsManager {
      * @return {void}
      */
     async pay(id: number, toPayID: number, amount: number) {
+        if (amount < 0) throw new Error("Invalid Amount");
+
         let req = await axios.patch(`${this.URL}/credits/${id}`, { amount, to: toPayID }, { headers: { Authorization: `Bearer ${this.token}` } });
         if (req.status == 403) throw new Error("No Permission");
         if (req.status == 404) throw new Error("User not Found");