diff --git a/swarm/services/chequebook/contract/chequebook.sol b/swarm/services/chequebook/contract/chequebook.sol
index eefe6c0637..e6979c0f0b 100644
--- a/swarm/services/chequebook/contract/chequebook.sol
+++ b/swarm/services/chequebook/contract/chequebook.sol
@@ -1,4 +1,6 @@
-import "mortal";
+pragma solidity ^0.4.3;
+
+import "mortal.sol" as mortal;
 
 /// @title Chequebook for Ethereum micropayments
 /// @author Daniel A. Nagy <daniel@ethdev.com>
@@ -9,6 +11,14 @@ contract chequebook is mortal {
     /// @notice Overdraft event
     event Overdraft(address deadbeat);
 
+    /// @notice Deposit event
+    event Deposit(uint256 amount);
+
+    /// @notice Top up chequebook
+    function() payable {
+        Deposit(msg.value);
+    }
+
     /// @notice Cash cheque
     ///
     /// @param beneficiary beneficiary address
@@ -39,7 +49,7 @@ contract chequebook is mortal {
             // owner.sendToDebtorsPrison();
             Overdraft(owner);
             // Compensate beneficiary.
-            suicide(beneficiary);
+            selfdestruct(beneficiary);
         }
     }
 }