diff --git a/contracts/token/opensea/seadrop/ERC721ContractMetadata_NFTC.sol b/contracts/token/opensea/seadrop/ERC721ContractMetadata_NFTC.sol
index df137fd..1d8af44 100644
--- a/contracts/token/opensea/seadrop/ERC721ContractMetadata_NFTC.sol
+++ b/contracts/token/opensea/seadrop/ERC721ContractMetadata_NFTC.sol
@@ -206,4 +206,17 @@ abstract contract ERC721ContractMetadata_NFTC is
     function royaltyBasisPoints() external pure returns (uint256) {
         return 0;
     }
+
+    /**
+     * @dev Internal pure function to cast a `bool` value to a `uint256` value.
+     *
+     * @param b The `bool` value to cast.
+     *
+     * @return u The `uint256` value.
+     */
+    function _cast(bool b) internal pure returns (uint256 u) {
+        assembly {
+            u := b
+        }
+    }
 }
\ No newline at end of file
diff --git a/package.json b/package.json
index df3ef92..659ba35 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@nftculture/nftc-contracts",
-    "version": "1.5.23",
+    "version": "1.5.24",
     "description": "NFTCulture Open Source Contracts Project",
     "author": "@NFTCulture",
     "license": "MIT",