diff --git a/ArbOwner.sol b/ArbOwner.sol
index 3ee0baa..61311c8 100644
--- a/ArbOwner.sol
+++ b/ArbOwner.sol
@@ -222,6 +222,12 @@ interface ArbOwner {
         string calldata chainConfig
     ) external;
 
+    /// @notice Sets the increased calldata price feature on or off (EIP-7623)
+    /// @notice Available in ArbOS version 40 and above with default as false
+    function setCalldataPriceIncrease(
+        bool enable
+    ) external;
+
     /// Emitted when a successful call is made to this precompile
     event OwnerActs(bytes4 indexed method, address indexed owner, bytes data);
 }
diff --git a/ArbOwnerPublic.sol b/ArbOwnerPublic.sol
index 6c5be9a..8e26b7e 100644
--- a/ArbOwnerPublic.sol
+++ b/ArbOwnerPublic.sol
@@ -40,5 +40,9 @@ interface ArbOwnerPublic {
         view
         returns (uint64 arbosVersion, uint64 scheduledForTimestamp);
 
+    /// @notice Checks if the increased calldata price feature (EIP-7623) is enabled
+    /// @notice Available in ArbOS version 40 with default as false
+    function isCalldataPriceIncreaseEnabled() external view returns (bool);
+
     event ChainOwnerRectified(address rectifiedOwner);
 }
diff --git a/package.json b/package.json
index 557a768..e9a7f81 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@arbitrum/nitro-precompile-interfaces",
-  "version": "31.0.0",
+  "version": "40.0.0",
   "description": "Solidity interfaces for Arbitrum Nitro precompiled contracts",
   "author": "Offchain Labs, Inc.",
   "license": "BUSL-1.1",