diff --git a/src/ERC1155SeaDrop.sol b/src/ERC1155SeaDrop.sol
index 09969e4e..b6a6d98f 100644
--- a/src/ERC1155SeaDrop.sol
+++ b/src/ERC1155SeaDrop.sol
@@ -11,7 +11,7 @@ import {
  * @author Ryan Ghods (ralxz.eth)
  * @author Stephan Min (stephanm.eth)
  * @author Michael Cohen (notmichael.eth)
- * @contributor Limit Break (@limitbreak)
+ * @custom:contributor Limit Break (@limitbreak)
  * @notice An ERC1155 token contract that can mint as a
  *         Seaport contract offerer.
  *         Implements Limit Break's Creator Token Standards transfer
diff --git a/src/ERC721SeaDrop.sol b/src/ERC721SeaDrop.sol
index 4747cc14..fc24424e 100644
--- a/src/ERC721SeaDrop.sol
+++ b/src/ERC721SeaDrop.sol
@@ -13,7 +13,7 @@ import { ERC721A } from "ERC721A/ERC721A.sol";
  * @author Ryan Ghods (ralxz.eth)
  * @author Stephan Min (stephanm.eth)
  * @author Michael Cohen (notmichael.eth)
- * @contributor Limit Break (@limitbreak)
+ * @custom:contributor Limit Break (@limitbreak)
  * @notice An ERC721 token contract based on ERC721A that can mint as a
  *         Seaport contract offerer.
  *         Implements Limit Break's Creator Token Standards transfer
diff --git a/src/clones/ERC1155ContractMetadataCloneable.sol b/src/clones/ERC1155ContractMetadataCloneable.sol
index df9c39db..8bbe42d6 100644
--- a/src/clones/ERC1155ContractMetadataCloneable.sol
+++ b/src/clones/ERC1155ContractMetadataCloneable.sol
@@ -324,8 +324,10 @@ contract ERC1155ContractMetadataCloneable is
         pure
         returns (bytes4 functionSignature, bool isViewFunction)
     {
-        functionSignature = keccak256(
-            "validateTransfer(address,address,address,uint256,uint256)"
+        functionSignature = bytes4(
+            keccak256(
+                "validateTransfer(address,address,address,uint256,uint256)"
+            )
         );
         isViewFunction = true;
     }
diff --git a/src/clones/ERC1155SeaDropCloneable.sol b/src/clones/ERC1155SeaDropCloneable.sol
index cc462f1b..dcd2bd1a 100644
--- a/src/clones/ERC1155SeaDropCloneable.sol
+++ b/src/clones/ERC1155SeaDropCloneable.sol
@@ -11,7 +11,7 @@ import {
  * @author Ryan Ghods (ralxz.eth)
  * @author Stephan Min (stephanm.eth)
  * @author Michael Cohen (notmichael.eth)
- * @contributor Limit Break (@limitbreak)
+ * @custom:contributor Limit Break (@limitbreak)
  * @notice A cloneable ERC1155 token contract that can mint as a
  *         Seaport contract offerer.
  *         Implements Limit Break's Creator Token Standards transfer
diff --git a/src/lib/ERC1155ContractMetadata.sol b/src/lib/ERC1155ContractMetadata.sol
index 9b9cfcf9..98d76233 100644
--- a/src/lib/ERC1155ContractMetadata.sol
+++ b/src/lib/ERC1155ContractMetadata.sol
@@ -322,8 +322,10 @@ contract ERC1155ContractMetadata is
         pure
         returns (bytes4 functionSignature, bool isViewFunction)
     {
-        functionSignature = keccak256(
-            "validateTransfer(address,address,address,uint256,uint256)"
+        functionSignature = bytes4(
+            keccak256(
+                "validateTransfer(address,address,address,uint256,uint256)"
+            )
         );
         isViewFunction = true;
     }
diff --git a/src/lib/ERC721ContractMetadata.sol b/src/lib/ERC721ContractMetadata.sol
index ae0935a2..aa668a27 100644
--- a/src/lib/ERC721ContractMetadata.sol
+++ b/src/lib/ERC721ContractMetadata.sol
@@ -290,8 +290,8 @@ contract ERC721ContractMetadata is
         pure
         returns (bytes4 functionSignature, bool isViewFunction)
     {
-        functionSignature = keccak256(
-            "validateTransfer(address,address,address,uint256)"
+        functionSignature = bytes4(
+            keccak256("validateTransfer(address,address,address,uint256)")
         );
         isViewFunction = false;
     }