diff --git a/packages/core/src/Cardano/types/Governance.ts b/packages/core/src/Cardano/types/Governance.ts
index 268fae39655..92df6798c4b 100644
--- a/packages/core/src/Cardano/types/Governance.ts
+++ b/packages/core/src/Cardano/types/Governance.ts
@@ -2,7 +2,7 @@ import * as Crypto from '@cardano-sdk/crypto';
 import { Credential, CredentialType, RewardAccount } from '../Address';
 import { EpochNo, Fraction, ProtocolVersion, TransactionId } from '.';
 import { Lovelace } from './Value';
-import { ProtocolParametersUpdate } from './ProtocolParameters';
+import { ProtocolParametersUpdateConway } from './ProtocolParameters';
 
 export type Anchor = {
   url: string;
@@ -43,7 +43,7 @@ export type Constitution = {
 export type ParameterChangeAction = {
   __typename: GovernanceActionType.parameter_change_action;
   governanceActionId: GovernanceActionId | null;
-  protocolParamUpdate: ProtocolParametersUpdate;
+  protocolParamUpdate: ProtocolParametersUpdateConway;
   policyHash: Crypto.Hash28ByteBase16 | null;
 };
 
diff --git a/packages/core/src/Cardano/types/ProtocolParameters.ts b/packages/core/src/Cardano/types/ProtocolParameters.ts
index cd9dd9c1e29..a47a960a17c 100644
--- a/packages/core/src/Cardano/types/ProtocolParameters.ts
+++ b/packages/core/src/Cardano/types/ProtocolParameters.ts
@@ -137,13 +137,13 @@ type NewProtocolParamsInConway = {
   minFeeRefScriptCostPerByte: string;
 };
 
-type ConwayProtocolParameters = BabbageProtocolParameters & NewProtocolParamsInConway;
-
-export type ProtocolParameters = ConwayProtocolParameters;
+export type ProtocolParameters = BabbageProtocolParameters & NewProtocolParamsInConway;
+export type ConwayProtocolParameters = Omit<ProtocolParameters, 'protocolVersion'>;
 
 // Even tho extraEntropy was deprecated on babbage era, and protocolVersion was deprecated in conway era,
 // they are still present in the ProtocolParametersUpdate structure since this structure is backward compatible with all eras.
 export type ProtocolParametersUpdate = Partial<ProtocolParameters & Pick<AlonzoProtocolParams, 'extraEntropy'>>;
+export type ProtocolParametersUpdateConway = Partial<ConwayProtocolParameters>;
 
 export type GenesisDelegateKeyHash = Crypto.Hash28ByteBase16;
 export type ProposedProtocolParameterUpdates = Map<GenesisDelegateKeyHash, ProtocolParametersUpdate>;
diff --git a/packages/core/src/Serialization/Update/ProtocolParamUpdate.ts b/packages/core/src/Serialization/Update/ProtocolParamUpdate.ts
index 083f391046f..169258bd675 100644
--- a/packages/core/src/Serialization/Update/ProtocolParamUpdate.ts
+++ b/packages/core/src/Serialization/Update/ProtocolParamUpdate.ts
@@ -446,7 +446,9 @@ export class ProtocolParamUpdate {
    *
    * @param parametersUpdate core parametersUpdate object.
    */
-  static fromCore(parametersUpdate: Cardano.ProtocolParametersUpdate) {
+  static fromCore<T extends Cardano.ProtocolParametersUpdateConway = Cardano.ProtocolParametersUpdate>(
+    parametersUpdate: T
+  ) {
     const params = new ProtocolParamUpdate();
 
     params.#minFeeA = parametersUpdate.minFeeCoefficient ? BigInt(parametersUpdate.minFeeCoefficient) : undefined;
@@ -470,14 +472,10 @@ export class ProtocolParamUpdate {
       ? UnitInterval.fromFloat(Number(parametersUpdate.decentralizationParameter))
       : undefined;
     params.#minPoolCost = parametersUpdate.minPoolCost ? BigInt(parametersUpdate.minPoolCost) : undefined;
-    params.#protocolVersion = parametersUpdate.protocolVersion
-      ? ProtocolVersion.fromCore(parametersUpdate.protocolVersion)
-      : undefined;
     params.#maxValueSize = parametersUpdate.maxValueSize;
     params.#maxTxSize = parametersUpdate.maxTxSize;
     params.#collateralPercentage = parametersUpdate.collateralPercentage;
     params.#maxCollateralInputs = parametersUpdate.maxCollateralInputs;
-    params.#extraEntropy = parametersUpdate.extraEntropy ? HexBlob(parametersUpdate.extraEntropy) : undefined;
     params.#costModels = parametersUpdate.costModels ? Costmdls.fromCore(parametersUpdate.costModels) : undefined;
     params.#executionCosts = parametersUpdate.prices ? ExUnitPrices.fromCore(parametersUpdate.prices) : undefined;
     params.#maxTxExUnits = parametersUpdate.maxExecutionUnitsPerTransaction
@@ -503,6 +501,12 @@ export class ProtocolParamUpdate {
       ? UnitInterval.fromFloat(Number(parametersUpdate.minFeeRefScriptCostPerByte))
       : undefined;
 
+    const { protocolVersion, extraEntropy } = parametersUpdate as unknown as Cardano.ProtocolParametersUpdate;
+    if (protocolVersion !== undefined || extraEntropy !== undefined) {
+      params.#protocolVersion = protocolVersion ? ProtocolVersion.fromCore(protocolVersion) : undefined;
+      params.#extraEntropy = extraEntropy ? HexBlob(extraEntropy) : undefined;
+    }
+
     return params;
   }
 
diff --git a/packages/core/test/Serialization/TransactionBody/ProposalProcedure/ParameterChangeAction.test.ts b/packages/core/test/Serialization/TransactionBody/ProposalProcedure/ParameterChangeAction.test.ts
index 10e9c8fa1db..56c056ca747 100644
--- a/packages/core/test/Serialization/TransactionBody/ProposalProcedure/ParameterChangeAction.test.ts
+++ b/packages/core/test/Serialization/TransactionBody/ProposalProcedure/ParameterChangeAction.test.ts
@@ -7,7 +7,7 @@ import { ParameterChangeAction } from '../../../../src/Serialization';
 
 // Test data used in the following tests was generated with the cardano-serialization-lib
 const cbor = HexBlob(
-  '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'
+  '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'
 );
 
 const vasilPlutusV1Costmdls = [
@@ -36,12 +36,15 @@ const vasilPlutusV2Costmdls = [
 
 const core = {
   __typename: Cardano.GovernanceActionType.parameter_change_action,
-  governanceActionId: { actionIndex: 3, id: '0000000000000000000000000000000000000000000000000000000000000000' },
+  governanceActionId: {
+    actionIndex: 3,
+    id: Cardano.TransactionId('0000000000000000000000000000000000000000000000000000000000000000')
+  },
   policyHash: Hash28ByteBase16('8293d319ef5b3ac72366dd28006bd315b715f7e7cfcbd3004129b80d'),
   protocolParamUpdate: {
     coinsPerUtxoByte: 35_000,
     collateralPercentage: 852,
-    committeeTermLimit: 200,
+    committeeTermLimit: Cardano.EpochNo(200),
     costModels: new Map([
       [PlutusLanguageVersion.V1, vasilPlutusV1Costmdls],
       [PlutusLanguageVersion.V2, vasilPlutusV2Costmdls]
@@ -88,7 +91,6 @@ const core = {
       securityRelevantParamVotingThreshold: { denominator: 1, numerator: 1 }
     },
     prices: { memory: 0.5, steps: 0.5 },
-    protocolVersion: { major: 1, minor: 3 },
     stakeKeyDeposit: 2_000_000,
     treasuryExpansion: '0.25'
   }
diff --git a/packages/util-dev/src/mockProviders/mockData.ts b/packages/util-dev/src/mockProviders/mockData.ts
index b655b625052..5a6d7a703b2 100644
--- a/packages/util-dev/src/mockProviders/mockData.ts
+++ b/packages/util-dev/src/mockProviders/mockData.ts
@@ -42,7 +42,7 @@ export const protocolParameters = {
   prices: { memory: 0.0577, steps: 0.000_007_21 },
   protocolVersion: { major: 5, minor: 0 },
   stakeKeyDeposit: 2_000_000
-} as Cardano.ProtocolParameters;
+} as Required<Cardano.ProtocolParametersUpdate>;
 
 export const epochRewards = [
   {