diff --git a/packages/sdk/src/types.ts b/packages/sdk/src/types.ts
index 56da7b1a..5dfd60aa 100644
--- a/packages/sdk/src/types.ts
+++ b/packages/sdk/src/types.ts
@@ -51,10 +51,10 @@ export interface MsgStoreCode extends MsgTemplate {
     readonly sender: string;
     /** Base64 encoded Wasm */
     readonly wasm_byte_code: string;
-    /** A valid URI reference to the contract's source code, optional */
-    readonly source?: string;
-    /** A docker tag, optional */
-    readonly builder?: string;
+    /** A valid URI reference to the contract's source code. Can be empty. */
+    readonly source: string;
+    /** A docker tag. Can be empty. */
+    readonly builder: string;
   };
 }
 
diff --git a/packages/sdk/types/types.d.ts b/packages/sdk/types/types.d.ts
index 2d26a1b3..c2d760a3 100644
--- a/packages/sdk/types/types.d.ts
+++ b/packages/sdk/types/types.d.ts
@@ -39,10 +39,10 @@ export interface MsgStoreCode extends MsgTemplate {
     readonly sender: string;
     /** Base64 encoded Wasm */
     readonly wasm_byte_code: string;
-    /** A valid URI reference to the contract's source code, optional */
-    readonly source?: string;
-    /** A docker tag, optional */
-    readonly builder?: string;
+    /** A valid URI reference to the contract's source code. Can be empty. */
+    readonly source: string;
+    /** A docker tag. Can be empty. */
+    readonly builder: string;
   };
 }
 /**