diff --git a/contracts/DODOStarter/impl/FairFunding.sol b/contracts/DODOStarter/impl/FairFunding.sol
index 027418e..dc1e0a3 100644
--- a/contracts/DODOStarter/impl/FairFunding.sol
+++ b/contracts/DODOStarter/impl/FairFunding.sol
@@ -273,4 +273,11 @@ contract FairFunding is Vesting {
     function isSettled() public view returns (bool) {
         return _FINAL_PRICE_ != 0;
     }
+
+    // ============ Version Control ============
+
+    function version() virtual external pure returns (string memory) {
+        return "FairFunding 1.0.0";
+    }
+
 }
diff --git a/contracts/DODOStarter/impl/InstantFunding.sol b/contracts/DODOStarter/impl/InstantFunding.sol
index 6a5b9f7..3e7c787 100644
--- a/contracts/DODOStarter/impl/InstantFunding.sol
+++ b/contracts/DODOStarter/impl/InstantFunding.sol
@@ -211,4 +211,11 @@ contract InstantFunding is Vesting {
     function isFundingEnd() public view returns (bool) {
         return block.timestamp > _START_TIME_.add(_BIDDING_DURATION_);
     }
+
+
+    // ============ Version Control ============
+
+    function version() virtual external pure returns (string memory) {
+        return "InstantFunding 1.0.0";
+    }
 }