diff --git a/cardano-cli/cardano-cli.cabal b/cardano-cli/cardano-cli.cabal
index 4170b5dcc1..9dadeca359 100644
--- a/cardano-cli/cardano-cli.cabal
+++ b/cardano-cli/cardano-cli.cabal
@@ -203,8 +203,8 @@ library
                       , cardano-crypto-wrapper ^>= 1.5.1
                       , cardano-data >= 1.1
                       , cardano-git-rev ^>= 0.2.2
+                      , cardano-ledger-api
                       , cardano-ledger-byron >= 1.0.1.0
-                      , cardano-ledger-core
                       , cardano-ping ^>= 0.2.0.13
                       , cardano-prelude
                       , cardano-slotting ^>= 0.2.0.0
diff --git a/cardano-cli/src/Cardano/CLI/EraBased/Run/Genesis.hs b/cardano-cli/src/Cardano/CLI/EraBased/Run/Genesis.hs
index 27f498511c..b367cd00cc 100644
--- a/cardano-cli/src/Cardano/CLI/EraBased/Run/Genesis.hs
+++ b/cardano-cli/src/Cardano/CLI/EraBased/Run/Genesis.hs
@@ -1177,11 +1177,10 @@ readConwayGenesis fpath = do
 --TODO: eliminate this and get only the necessary params, and get them in a more
 -- helpful way rather than requiring them as a local file.
 readProtocolParameters :: ()
-  => FromJSON (L.PParams (ShelleyLedgerEra era))
   => ShelleyBasedEra era
   -> ProtocolParamsFile
   -> ExceptT ProtocolParamsError IO (L.PParams (ShelleyLedgerEra era))
-readProtocolParameters _era (ProtocolParamsFile fpath) = do
+readProtocolParameters sbe (ProtocolParamsFile fpath) = do
   pparams <- handleIOExceptT (ProtocolParamsErrorFile . FileIOError fpath) $ LBS.readFile fpath
   firstExceptT (ProtocolParamsErrorJSON fpath . Text.pack) . hoistEither $
-    Aeson.eitherDecode' pparams
+    shelleyBasedEraConstraints sbe $ Aeson.eitherDecode' pparams
diff --git a/cardano-cli/src/Cardano/CLI/EraBased/Run/Transaction.hs b/cardano-cli/src/Cardano/CLI/EraBased/Run/Transaction.hs
index dc114b2f91..03bf00b66b 100644
--- a/cardano-cli/src/Cardano/CLI/EraBased/Run/Transaction.hs
+++ b/cardano-cli/src/Cardano/CLI/EraBased/Run/Transaction.hs
@@ -52,7 +52,7 @@ import           Cardano.CLI.Types.Errors.TxCmdError
 import           Cardano.CLI.Types.Errors.TxValidationError
 import           Cardano.CLI.Types.Output (renderScriptCosts)
 import           Cardano.CLI.Types.TxFeature
-import qualified Cardano.Ledger.Core.PParams as L
+import qualified Cardano.Ledger.Api.PParams as L
 import qualified Ouroboros.Network.Protocol.LocalStateQuery.Type as Consensus
 import qualified Ouroboros.Network.Protocol.LocalTxSubmission.Client as Net.Tx