diff --git a/cabal.project b/cabal.project
index 7280dace5b8..d42112ee4a6 100644
--- a/cabal.project
+++ b/cabal.project
@@ -39,11 +39,12 @@ package plutus-merkle-tree
 -- Always show detailed output for tests
 test-show-details: direct
 
+-- NOTE: 1.34.1 + exposed Key interface (backported)
 source-repository-package
   type: git
-  location: https://github.com/input-output-hk/cardano-node.git
-  tag: 1.34.1
-  --sha256: 1hh53whcj5y9kw4qpkiza7rmkniz18r493vv4dzl1a8r5fy3b2bv
+  location: https://github.com/ch1bo/cardano-node.git
+  tag: 432ad674067b3b04b7863a19997e6c52b390d7a0
+  --sha256: 0i13k6f7rxrxv1kib8lvg1c6v03xrkapm0yxdp2gy17vlmri4jhm
   subdir:
     cardano-api
     cardano-git-rev
diff --git a/hydra-cardano-api/src/Hydra/Cardano/Api.hs b/hydra-cardano-api/src/Hydra/Cardano/Api.hs
index ca67467105d..824227642d7 100644
--- a/hydra-cardano-api/src/Hydra/Cardano/Api.hs
+++ b/hydra-cardano-api/src/Hydra/Cardano/Api.hs
@@ -37,6 +37,7 @@ import Cardano.Api as X hiding (
   AddressInEra (..),
   AddressTypeInEra (..),
   BalancedTxBody (..),
+  Key (..),
   KeyWitness,
   PlutusScript,
   Script (..),