diff --git a/contracts/Endpoint.sol b/contracts/Endpoint.sol
index 219ab6b..37ae767 100644
--- a/contracts/Endpoint.sol
+++ b/contracts/Endpoint.sol
@@ -196,7 +196,7 @@ contract Endpoint is Ownable, ILayerZeroEndpoint {
     // Migration step 2: set the receive version
     // after all messages sent from the old version are received
     // the UA can now safely switch to the new receive version
-    // it is the UA's responsibility make sure all messages from the old version are processed
+    // it is the UA's responsibility to make sure all messages from the old version are processed
     function setReceiveVersion(uint16 _newVersion) external override validVersion(_newVersion) {
         // write into config
         LibraryConfig storage uaConfig = uaConfigLookup[msg.sender];
diff --git a/contracts/UltraLightNode.sol b/contracts/UltraLightNode.sol
index 653ba3b..6fa26ae 100644
--- a/contracts/UltraLightNode.sol
+++ b/contracts/UltraLightNode.sol
@@ -188,7 +188,7 @@ contract UltraLightNode is ILayerZeroMessagingLibrary, ILayerZeroUltraLightNodeV
 
             // (a - 3), pay the protocol
             {
-                // if no ZRO token or not specifying a payment address, pay in native token
+                // if no ZRO token or not specify a payment address, pay in native token
                 bool payInNative = _zroPaymentAddress == address(0x0) || address(layerZeroToken) == address(0x0);
                 uint protocolFee = treasuryContract.getFees(!payInNative, totalNativeFee, oracleFee); // totalNativeFee == relayerFee here
 
diff --git a/contracts/proof/FPValidator.sol b/contracts/proof/FPValidator.sol
index 4ea48d3..d8e1fae 100644
--- a/contracts/proof/FPValidator.sol
+++ b/contracts/proof/FPValidator.sol
@@ -82,7 +82,7 @@ contract FPValidator is ILayerZeroValidationLibrary, IValidationLibraryHelperV2
         }
 
         // TYPE_SWAP_REMOTE == 1 && only if the payload has a payload
-        // only swapRemote inside of stargate can call sgReceive on an user supplied to address
+        // only swapRemote inside of stargate can call sgReceive on a user supplied to address
         // thus we do not care about the other type functions even if the toAddress is overly long.
         if (functionType == 1) {
             // decode the _payload with its types
diff --git a/contracts/proof/MPTValidator01.sol b/contracts/proof/MPTValidator01.sol
index 7e9f09a..9792ac5 100644
--- a/contracts/proof/MPTValidator01.sol
+++ b/contracts/proof/MPTValidator01.sol
@@ -85,7 +85,7 @@ contract MPTValidator01 is ILayerZeroValidationLibrary, IValidationLibraryHelper
         }
 
         // TYPE_SWAP_REMOTE == 1 && only if the payload has a payload
-        // only swapRemote inside of stargate can call sgReceive on an user supplied to address
+        // only swapRemote inside of stargate can call sgReceive on a user supplied to address
         // thus we do not care about the other type functions even if the toAddress is overly long.
         if (functionType == 1) {
             // decode the _payload with its types