diff --git a/README.md b/README.md
index dea1ec3..00ad608 100644
--- a/README.md
+++ b/README.md
@@ -86,10 +86,28 @@ Also, additional utils from `sources/utils/` are used in tests and deployment sc
 
 Main smart contract is `jetton_minter.tact`. It imports `messages.tact` and `jetton_wallet.tact`, so they will be compiled automatically, when setting `jetton_minter.tact` as target in `tact.config.json`.
 ### Traits
-Jetton minter is using *OwnableTransferable* and *Deployable* trait. Actually, you can remove *Deployable* trait. It is used only for more convenient deployment in tests. 
+Jetton minter is using only *OwnableTransferable* which is inherited from *Ownable* trait.
 
 Jetton wallet is using only *Ownable* trait.
 
+**Note: These traits are implemented in stdlib.**
+
+Scheme of inheritance and imports:
+```mermaid
+graph LR
+    B[jetton_minter.tact] -->|import| A[messages.tact]
+    C[jetton_wallet.tact] -->|import| A[messages.tact]
+    B[jetton_minter.tact] -->|import| C[jetton_wallet.tact]
+
+    C[jetton_wallet.tact] -->|uses| E[ownable]
+    B[jetton_minter.tact] -->|uses| F[ownableTransferable]
+    F[ownableTransferable] -->|inherits| E[ownable]
+
+    class E,F ownableStyle;
+
+    classDef ownableStyle stroke-width:2,rx:25,ry:25;
+
+```
 You can learn more about traits in the [Tact standard library](https://docs.tact-lang.org/ref/standard-libraries/).
 
 ## Best Practices
diff --git a/sources/contract.spec.ts b/sources/contract.spec.ts
index 3af2c15..c5dd0e6 100644
--- a/sources/contract.spec.ts
+++ b/sources/contract.spec.ts
@@ -146,13 +146,16 @@ describe("JettonMinter", () => {
         notDeployer = await blockchain.treasury('notDeployer');
 
         defaultContent = beginCell().endCell();
-        let msg: Deploy = {
-            $$type: "Deploy",
-            queryId: 0n,
+        let msg: TokenUpdateContent = {
+            $$type: "TokenUpdateContent",
+            content: defaultContent,
         }
         
 
         jettonMinter = blockchain.openContract(await JettonMinter.fromInit(deployer.address, defaultContent));
+
+        //We send Update content to deploy the contract, because it is not automatically deployed after blockchain.openContract
+        //And to deploy it we should send any message. But update content message with same content does not affect anything. That is why I chose it.
         const deployResult = await jettonMinter.send(deployer.getSender(), {value: toNano("0.1")}, msg);
 
         expect(deployResult.transactions).toHaveTransaction({
diff --git a/sources/jetton_minter.tact b/sources/jetton_minter.tact
index 562c1b7..36a9af8 100644
--- a/sources/jetton_minter.tact
+++ b/sources/jetton_minter.tact
@@ -13,7 +13,7 @@ struct JettonMasterState {
     jettonWalletCode: Cell;
 }
 
-contract JettonMinter with OwnableTransferable, Deployable {
+contract JettonMinter with OwnableTransferable {
     totalSupply: Int as coins;
     mintable: Bool;
     owner: Address;