diff --git a/src-upgradeable/src/ERC721ContractMetadataUpgradeable.sol b/src-upgradeable/src/ERC721ContractMetadataUpgradeable.sol
index 1a350642..75174688 100644
--- a/src-upgradeable/src/ERC721ContractMetadataUpgradeable.sol
+++ b/src-upgradeable/src/ERC721ContractMetadataUpgradeable.sol
@@ -304,8 +304,8 @@ contract ERC721ContractMetadataUpgradeable is
         pure
         returns (bytes4 functionSignature, bool isViewFunction)
     {
-        functionSignature = keccak256(
-            "validateTransfer(address,address,address,uint256)"
+        functionSignature = bytes4(
+            keccak256("validateTransfer(address,address,address,uint256)")
         );
         isViewFunction = false;
     }
diff --git a/src-upgradeable/src/ERC721SeaDropUpgradeable.sol b/src-upgradeable/src/ERC721SeaDropUpgradeable.sol
index f47c96cc..ffae3445 100644
--- a/src-upgradeable/src/ERC721SeaDropUpgradeable.sol
+++ b/src-upgradeable/src/ERC721SeaDropUpgradeable.sol
@@ -42,7 +42,7 @@ import {
  * @author James Wenzel (emo.eth)
  * @author Ryan Ghods (ralxz.eth)
  * @author Stephan Min (stephanm.eth)
- * @contributor Limit Break (@limitbreak)
+ * @custom:contributor Limit Break (@limitbreak)
  * @notice ERC721SeaDrop is a token contract that contains methods
  *         to properly interact with SeaDrop.
  *         Implements Limit Break's Creator Token Standards transfer
diff --git a/src/ERC721ContractMetadata.sol b/src/ERC721ContractMetadata.sol
index b68295ae..e9643dff 100644
--- a/src/ERC721ContractMetadata.sol
+++ b/src/ERC721ContractMetadata.sol
@@ -294,8 +294,8 @@ 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;
     }
diff --git a/src/ERC721SeaDrop.sol b/src/ERC721SeaDrop.sol
index e14727a8..5cb11482 100644
--- a/src/ERC721SeaDrop.sol
+++ b/src/ERC721SeaDrop.sol
@@ -37,7 +37,7 @@ 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 ERC721SeaDrop is a token contract that contains methods
  *         to properly interact with SeaDrop.
  *         Implements Limit Break's Creator Token Standards transfer
diff --git a/src/clones/ERC721ContractMetadataCloneable.sol b/src/clones/ERC721ContractMetadataCloneable.sol
index 4767a159..53173314 100644
--- a/src/clones/ERC721ContractMetadataCloneable.sol
+++ b/src/clones/ERC721ContractMetadataCloneable.sol
@@ -289,8 +289,8 @@ contract ERC721ContractMetadataCloneable is
         pure
         returns (bytes4 functionSignature, bool isViewFunction)
     {
-        functionSignature = keccak256(
-            "validateTransfer(address,address,address,uint256)"
+        functionSignature = bytes4(
+            keccak256("validateTransfer(address,address,address,uint256)")
         );
         isViewFunction = false;
     }
diff --git a/src/clones/ERC721SeaDropCloneable.sol b/src/clones/ERC721SeaDropCloneable.sol
index 934bf13c..8330877a 100644
--- a/src/clones/ERC721SeaDropCloneable.sol
+++ b/src/clones/ERC721SeaDropCloneable.sol
@@ -39,7 +39,7 @@ 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 ERC721SeaDrop is a token contract that contains methods
  *         to properly interact with SeaDrop.
  *         Implements Limit Break's Creator Token Standards transfer