diff --git a/certora/helpers/MockDllFifo.sol b/certora/helpers/MockDllFifo.sol
index de97115..2531de0 100644
--- a/certora/helpers/MockDllFifo.sol
+++ b/certora/helpers/MockDllFifo.sol
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 pragma solidity ^0.8.0;
 
-import "../munged-fifo/DoubleLinkedList.sol";
+import {DoubleLinkedList} from "../munged-fifo/DoubleLinkedList.sol";
 
 contract MockDllFifo {
     using DoubleLinkedList for DoubleLinkedList.List;
diff --git a/certora/helpers/MockDllSimple.sol b/certora/helpers/MockDllSimple.sol
index 65950fa..376e5d5 100644
--- a/certora/helpers/MockDllSimple.sol
+++ b/certora/helpers/MockDllSimple.sol
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 pragma solidity ^0.8.0;
 
-import "../munged-simple/DoubleLinkedList.sol";
+import {DoubleLinkedList} from "../munged-simple/DoubleLinkedList.sol";
 
 contract MockDllSimple {
     using DoubleLinkedList for DoubleLinkedList.List;