diff --git a/src/utils/BasePaymentTreasury.sol b/src/utils/BasePaymentTreasury.sol
index f7e45f4..78ab7e3 100644
--- a/src/utils/BasePaymentTreasury.sol
+++ b/src/utils/BasePaymentTreasury.sol
@@ -267,6 +267,10 @@ abstract contract BasePaymentTreasury is
      */
     error PaymentTreasuryNoFundsToClaim();
 
+    constructor() {
+        _disableInitializers();
+    }
+
     /**
      * @dev Scopes a payment ID for off-chain payments (createPayment/createPaymentBatch).
      * @param paymentId The external payment ID.
diff --git a/src/utils/BaseTreasury.sol b/src/utils/BaseTreasury.sol
index dc22468..c053e14 100644
--- a/src/utils/BaseTreasury.sol
+++ b/src/utils/BaseTreasury.sol
@@ -73,6 +73,10 @@ abstract contract BaseTreasury is Initializable, ICampaignTreasury, CampaignAcce
      */
     error TreasuryCampaignInfoIsPaused();
 
+    constructor() {
+        _disableInitializers();
+    }
+
     function __BaseContract_init(bytes32 platformHash, address infoAddress, address trustedForwarder_) internal {
         __CampaignAccessChecker_init(infoAddress);
         PLATFORM_HASH = platformHash;