diff --git a/packages/types/src/verge/sszTypes.ts b/packages/types/src/verge/sszTypes.ts
index 402944d5f939..c7e15942e7dd 100644
--- a/packages/types/src/verge/sszTypes.ts
+++ b/packages/types/src/verge/sszTypes.ts
@@ -3,9 +3,8 @@ import {
   ListCompositeType,
   ByteVectorType,
   VectorCompositeType,
-  ListBasicType,
-  UnionType,
-  NoneType,
+  ByteListType,
+  OptionalType,
 } from "@chainsafe/ssz";
 import {
   HISTORICAL_ROOTS_LIMIT,
@@ -17,8 +16,9 @@ import {
 import {ssz as primitiveSsz} from "../primitive/index.js";
 import {ssz as phase0Ssz} from "../phase0/index.js";
 import {ssz as altairSsz} from "../altair/index.js";
-import {ssz as capellaSsz} from "../capella/index.js";
-import {ssz as denebSsz} from "../deneb/index.js";
+import {ssz as bellatrixSsz} from "../bellatrix/index.js";
+// import {ssz as capellaSsz} from "../capella/index.js";
+// import {ssz as denebSsz} from "../deneb/index.js";
 
 const {UintNum64, Root, BLSSignature} = primitiveSsz;
 
@@ -38,11 +38,20 @@ export const SuffixStateDiff = new ContainerType(
     suffix: primitiveSsz.Byte,
     // Null means not currently present
     // TODO: Use new SSZ type Optional: https://github.com/ethereum/consensus-specs/commit/db74090c1e8dc1fb2c052bae268e22dc63061e32
-    currentValue: new UnionType([new NoneType(), primitiveSsz.Bytes32]),
+    currentValue: new OptionalType(primitiveSsz.Bytes32),
+    // newValue not present for the kaustenine network
     // Null means value not updated
-    newValue: new UnionType([new NoneType(), primitiveSsz.Bytes32]),
+    // newValue: new OptionalType(primitiveSsz.Bytes32),
   },
-  {typeName: "SuffixStateDiff", jsonCase: "eth2"}
+  {
+    typeName: "SuffixStateDiff",
+    casingMap: {
+      suffix: "suffix",
+      currentValue: "currentValue",
+      // newValue not present for the kaustenine network
+      // newValue: "newValue"
+    },
+  }
 );
 
 export const StemStateDiff = new ContainerType(
@@ -51,7 +60,7 @@ export const StemStateDiff = new ContainerType(
     // Valid only if list is sorted by suffixes
     suffixDiffs: new ListCompositeType(SuffixStateDiff, VERKLE_WIDTH),
   },
-  {typeName: "StemStateDiff", jsonCase: "eth2"}
+  {typeName: "StemStateDiff", casingMap: {stem: "stem", suffixDiffs: "suffixDiffs"}}
 );
 
 // Valid only if list is sorted by stems
@@ -59,30 +68,39 @@ export const StateDiff = new ListCompositeType(StemStateDiff, MAX_STEMS);
 
 export const IpaProof = new ContainerType(
   {
-    C_L: new VectorCompositeType(BanderwagonGroupElement, IPA_PROOF_DEPTH),
-    C_R: new VectorCompositeType(BanderwagonGroupElement, IPA_PROOF_DEPTH),
+    cl: new VectorCompositeType(BanderwagonGroupElement, IPA_PROOF_DEPTH),
+    cr: new VectorCompositeType(BanderwagonGroupElement, IPA_PROOF_DEPTH),
     finalEvaluation: BanderwagonFieldElement,
   },
-  {typeName: "IpaProof", jsonCase: "eth2"}
+  {typeName: "IpaProof", casingMap: {cl: "cl", cr: "cr", finalEvaluation: "finalEvaluation"}}
 );
 
 export const VerkleProof = new ContainerType(
   {
-    other_stems: new ListCompositeType(Bytes31, MAX_STEMS),
-    depth_extension_present: new ListBasicType(primitiveSsz.Uint8, MAX_STEMS),
-    commitments_by_path: new ListCompositeType(BanderwagonGroupElement, MAX_STEMS * MAX_COMMITMENTS_PER_STEM),
-    D: BanderwagonGroupElement,
+    otherStems: new ListCompositeType(Bytes31, MAX_STEMS),
+    depthExtensionPresent: new ByteListType(MAX_STEMS),
+    commitmentsByPath: new ListCompositeType(BanderwagonGroupElement, MAX_STEMS * MAX_COMMITMENTS_PER_STEM),
+    d: BanderwagonGroupElement,
     ipaProof: IpaProof,
   },
-  {typeName: "VerkleProof", jsonCase: "eth2"}
+  {
+    typeName: "VerkleProof",
+    casingMap: {
+      otherStems: "otherStems",
+      depthExtensionPresent: "depthExtensionPresent",
+      commitmentsByPath: "commitmentsByPath",
+      d: "d",
+      ipaProof: "ipaProof",
+    },
+  }
 );
 
 export const ExecutionWitness = new ContainerType(
   {
-    state_diff: StateDiff,
-    verkle_proof: VerkleProof,
+    stateDiff: StateDiff,
+    verkleProof: VerkleProof,
   },
-  {typeName: "ExecutionWitness", jsonCase: "eth2"}
+  {typeName: "ExecutionWitness", casingMap: {stateDiff: "stateDiff", verkleProof: "verkleProof"}}
 );
 
 // Beacon Chain types
@@ -90,7 +108,7 @@ export const ExecutionWitness = new ContainerType(
 
 export const ExecutionPayload = new ContainerType(
   {
-    ...denebSsz.ExecutionPayload.fields,
+    ...bellatrixSsz.ExecutionPayload.fields,
     executionWitness: ExecutionWitness, // New in verge
   },
   {typeName: "ExecutionPayload", jsonCase: "eth2"}
@@ -98,8 +116,8 @@ export const ExecutionPayload = new ContainerType(
 
 export const ExecutionPayloadHeader = new ContainerType(
   {
-    ...denebSsz.ExecutionPayloadHeader.fields,
-    executionWitness: ExecutionWitness, // New in verge
+    ...bellatrixSsz.ExecutionPayloadHeader.fields,
+    executionWitnessRoot: Root, // New in verge
   },
   {typeName: "ExecutionPayloadHeader", jsonCase: "eth2"}
 );
@@ -109,15 +127,15 @@ export const BeaconBlockBody = new ContainerType(
   {
     ...altairSsz.BeaconBlockBody.fields,
     executionPayload: ExecutionPayload, // Modified in verge
-    blsToExecutionChanges: capellaSsz.BeaconBlockBody.fields.blsToExecutionChanges,
-    blobKzgCommitments: denebSsz.BlobKzgCommitments,
+    // blsToExecutionChanges: capellaSsz.BeaconBlockBody.fields.blsToExecutionChanges,
+    // blobKzgCommitments: denebSsz.BlobKzgCommitments,
   },
   {typeName: "BeaconBlockBody", jsonCase: "eth2", cachePermanentRootStruct: true}
 );
 
 export const BeaconBlock = new ContainerType(
   {
-    ...denebSsz.BeaconBlock.fields,
+    ...bellatrixSsz.BeaconBlock.fields,
     body: BeaconBlockBody, // Modified in verge
   },
   {typeName: "BeaconBlock", jsonCase: "eth2", cachePermanentRootStruct: true}
@@ -135,14 +153,14 @@ export const BlindedBeaconBlockBody = new ContainerType(
   {
     ...BeaconBlockBody.fields,
     executionPayloadHeader: ExecutionPayloadHeader, // Modified in verge
-    blobKzgCommitments: denebSsz.BlobKzgCommitments,
+    // blobKzgCommitments: denebSsz.BlobKzgCommitments,
   },
   {typeName: "BlindedBeaconBlockBody", jsonCase: "eth2", cachePermanentRootStruct: true}
 );
 
 export const BlindedBeaconBlock = new ContainerType(
   {
-    ...denebSsz.BlindedBeaconBlock.fields,
+    ...bellatrixSsz.BlindedBeaconBlock.fields,
     body: BlindedBeaconBlockBody, // Modified in DENEB
   },
   {typeName: "BlindedBeaconBlock", jsonCase: "eth2", cachePermanentRootStruct: true}
@@ -196,10 +214,10 @@ export const BeaconState = new ContainerType(
     // Execution
     latestExecutionPayloadHeader: ExecutionPayloadHeader, // Modified in verge
     // Withdrawals
-    nextWithdrawalIndex: capellaSsz.BeaconState.fields.nextWithdrawalIndex,
-    nextWithdrawalValidatorIndex: capellaSsz.BeaconState.fields.nextWithdrawalValidatorIndex,
+    // nextWithdrawalIndex: capellaSsz.BeaconState.fields.nextWithdrawalIndex,
+    // nextWithdrawalValidatorIndex: capellaSsz.BeaconState.fields.nextWithdrawalValidatorIndex,
     // Deep history valid from Capella onwards
-    historicalSummaries: capellaSsz.BeaconState.fields.historicalSummaries,
+    // historicalSummaries: capellaSsz.BeaconState.fields.historicalSummaries,
   },
   {typeName: "BeaconState", jsonCase: "eth2"}
 );