diff --git a/src/components/CTypeDetails/CTypeDetails.astro b/src/components/CTypeDetails/CTypeDetails.astro
index bb708cce..39b15306 100644
--- a/src/components/CTypeDetails/CTypeDetails.astro
+++ b/src/components/CTypeDetails/CTypeDetails.astro
@@ -53,7 +53,7 @@ linkToW3N.pathname = web3Name ?? creator;
 
 const linkToBlock = new URL(`https://polkadot.js.org/apps/`);
 linkToBlock.searchParams.set('rpc', blockchainEndpoint);
-linkToBlock.hash = `/explorer/${block ? 'query/' + block : ''}`;
+linkToBlock.hash = `/explorer/${block != null ? 'query/' + block : ''}`;
 ---
 
 <section class={containerStyles.bigContainer}>
diff --git a/src/migrations/20241206171516-integrateBlockNumbers.cjs b/src/migrations/20241206171516-integrateBlockNumbers.cjs
new file mode 100644
index 00000000..09adc2ff
--- /dev/null
+++ b/src/migrations/20241206171516-integrateBlockNumbers.cjs
@@ -0,0 +1,57 @@
+'use strict';
+
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    // First, drop the 'search' column since it depends on 'block'
+    await queryInterface.removeColumn('CTypes', 'search');
+
+    // Transformation the type of 'block' from string to bigint
+    await queryInterface.changeColumn('CTypes', 'block', {
+      type: 'BIGINT using (block::bigint)',
+      allowNull: true,
+    });
+    // recreate the 'search' column
+    await queryInterface.addColumn(
+      'CTypes',
+      'search',
+      `tsvector generated always as (to_tsvector('english',
+        coalesce("id"::text, '') || ' ' ||
+        coalesce("schema"::text, '') || ' ' ||
+        coalesce("title"::text, '') || ' ' ||
+        coalesce("properties"::text, '') || ' ' ||
+        coalesce("type"::text, '') || ' ' ||
+        coalesce("creator"::text, '') || ' ' ||
+        coalesce("block"::text, '') || ' ' ||
+        coalesce("description"::text, ''))
+      ) stored`,
+    );
+  },
+
+  async down(queryInterface, Sequelize) {
+    // First, drop the 'search' column since it depends on 'block'
+    await queryInterface.removeColumn('CTypes', 'search');
+
+    // Transformation the type of 'block' from bigint to string
+    await queryInterface.changeColumn('CTypes', 'block', {
+      type: Sequelize.STRING,
+      allowNull: true,
+    });
+
+    // recreate the 'search' column
+    await queryInterface.addColumn(
+      'CTypes',
+      'search',
+      `tsvector generated always as (to_tsvector('english',
+        coalesce("id"::text, '') || ' ' ||
+        coalesce("schema"::text, '') || ' ' ||
+        coalesce("title"::text, '') || ' ' ||
+        coalesce("properties"::text, '') || ' ' ||
+        coalesce("type"::text, '') || ' ' ||
+        coalesce("creator"::text, '') || ' ' ||
+        coalesce("block"::text, '') || ' ' ||
+        coalesce("description"::text, ''))
+      ) stored`,
+    );
+  },
+};
diff --git a/src/models/ctype.ts b/src/models/ctype.ts
index 3c57227a..9140be62 100644
--- a/src/models/ctype.ts
+++ b/src/models/ctype.ts
@@ -13,7 +13,7 @@ interface CTypeDataInput extends Omit<ICType, '$id' | '$schema'> {
   schema: ICType['$schema'];
   creator: DidUri;
   createdAt: Date;
-  block: string | null;
+  block: bigint | null;
   description: string | null;
   attestationsCreated?: number;
 }
@@ -55,7 +55,7 @@ export const CTypeModelDefinition: ModelAttributes = {
     allowNull: false,
   },
   block: {
-    type: DataTypes.STRING,
+    type: DataTypes.BIGINT,
   },
   description: {
     type: DataTypes.STRING,
diff --git a/src/utilities/indexer/queryCTypes.ts b/src/utilities/indexer/queryCTypes.ts
index 3aced463..c67e1dc6 100644
--- a/src/utilities/indexer/queryCTypes.ts
+++ b/src/utilities/indexer/queryCTypes.ts
@@ -42,11 +42,14 @@ interface QueriedCType {
     web3NameId: string;
   };
   registrationBlock: {
-    id: string; // Block Ordinal Number, without punctuation
+    /** Block Ordinal Number, without punctuation */
+    id: string;
     hash: HexString;
-    timeStamp: string; // ISO8601 Date String, like 2022-02-09T13:09:18.217
+    /** ISO8601 Date String, like 2022-02-09T13:09:18.217 */
+    timeStamp: string;
   };
-  definition: string; // stringified JSON of cType Schema
+  /** Stringified JSON of cType Schema */
+  definition: string;
 }
 
 export async function queryCTypes() {
@@ -83,7 +86,7 @@ export async function queryCTypes() {
         schema: $schema,
         createdAt: new Date(registrationBlock.timeStamp + 'Z'),
         creator,
-        block: registrationBlock.id,
+        block: BigInt(registrationBlock.id),
         ...rest,
         attestationsCreated,
       });
diff --git a/src/utilities/mockCTypes.ts b/src/utilities/mockCTypes.ts
index ef2c6935..efd8b63e 100644
--- a/src/utilities/mockCTypes.ts
+++ b/src/utilities/mockCTypes.ts
@@ -10,7 +10,7 @@ export const mockCTypes: Record<string, CTypeData> = {
     creator: 'did:kilt:4pehddkhEanexVTTzWAtrrfo2R7xPnePpuiJLC7shQU894aY',
     createdAt: new Date('2023-05-01T12:00:00'),
     description: 'This is some example cType data',
-    block: '123',
+    block: 123n,
     attestationsCreated: 1,
     tags: [
       {
@@ -35,7 +35,7 @@ export const mockCTypes: Record<string, CTypeData> = {
     creator: 'did:kilt:4pehddkhEanexVTTzWAtrrfo2R7xPnePpuiJLC7shQU894aY',
     createdAt: new Date('2023-05-01T12:01:00'),
     description: 'This is an example of a CType with a nested property',
-    block: '321',
+    block: 321n,
     attestationsCreated: 22,
     isHidden: false,
   },
@@ -55,7 +55,7 @@ export const mockCTypes: Record<string, CTypeData> = {
     creator: 'did:kilt:4pehddkhEanexVTTzWAtrrfo2R7xPnePpuiJLC7shQU894aY',
     createdAt: new Date('2023-05-01T12:02:00'),
     description: 'This is an example of a CType with a nested CType',
-    block: '456',
+    block: 456n,
     attestationsCreated: 333,
     isHidden: false,
   },
@@ -68,7 +68,7 @@ export const mockCTypes: Record<string, CTypeData> = {
     creator: 'did:kilt:4pehddkhEanexVTTzWAtrrfo2R7xPnePpuiJLC7shQU894aY',
     createdAt: new Date('2023-05-01T12:00:00'),
     description: 'This is some example cType data',
-    block: '123',
+    block: 123n,
     attestationsCreated: 1,
     tags: [
       {
@@ -121,7 +121,7 @@ export const mockCTypes: Record<string, CTypeData> = {
     creator: 'did:kilt:4rrkiRTZgsgxjJDFkLsivqqKTqdUTuxKk3FX3mKFAeMxsR5E',
     attestationsCreated: 4444,
     createdAt: new Date('2023-05-01T12:03:00'),
-    block: '456',
+    block: 456n,
     isHidden: false,
   },
 };