diff --git a/CHANGELOG.md b/CHANGELOG.md
index fab3f74b62..6c2e5904e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 - Ensure metadata is only requested once upon startup (bypass on upgrade subscriptions)
 - Expand testing around `ExtrinsicEra` construction
 - Expand `Registry` to direct access to available signed extensions (in addition to types)
+- Cater for new `CheckSpecVersion` and `CheckTxVersion` signed extensions (with `SignerPayload` adjustments)
 
 # 1.13.1 May 6, 2020
 
diff --git a/packages/metadata/src/Decorated/extrinsics/index.spec.ts b/packages/metadata/src/Decorated/extrinsics/index.spec.ts
index b263cdcd18..7c28680180 100644
--- a/packages/metadata/src/Decorated/extrinsics/index.spec.ts
+++ b/packages/metadata/src/Decorated/extrinsics/index.spec.ts
@@ -29,7 +29,8 @@ describe('extrinsics', (): void => {
           implName: 'test',
           implVersion: new BN(123),
           specName: 'test',
-          specVersion: new BN(123)
+          specVersion: new BN(123),
+          transactionVersion: new BN(123)
         }
       }).toHex()
     ).toEqual(
diff --git a/packages/types/src/extrinsic/SignerPayload.spec.ts b/packages/types/src/extrinsic/SignerPayload.spec.ts
index 52e34227e8..476de5921a 100644
--- a/packages/types/src/extrinsic/SignerPayload.spec.ts
+++ b/packages/types/src/extrinsic/SignerPayload.spec.ts
@@ -24,6 +24,7 @@ describe('SignerPayload', (): void => {
     nonce: '0x00001234',
     specVersion: '0x00000006',
     tip: '0x00000000000000000000000000005678',
+    transactionVersion: '0x00000007',
     version: 3
   };
 
@@ -50,6 +51,7 @@ describe('SignerPayload', (): void => {
       nonce: '0x00001234',
       specVersion: '0x00000000',
       tip: '0x00000000000000000000000000005678',
+      transactionVersion: '0x00000000',
       version: 3
     });
   });
diff --git a/packages/types/src/extrinsic/SignerPayload.ts b/packages/types/src/extrinsic/SignerPayload.ts
index cd4c06eaac..7443e58691 100644
--- a/packages/types/src/extrinsic/SignerPayload.ts
+++ b/packages/types/src/extrinsic/SignerPayload.ts
@@ -49,7 +49,7 @@ export default class SignerPayload extends _Payload implements ISignerPayload {
    * @description Creates an representation of the structure as an ISignerPayload JSON
    */
   public toPayload (): SignerPayloadJSON {
-    const { address, blockHash, blockNumber, era, genesisHash, method, nonce, runtimeVersion: { specVersion }, tip, version } = this;
+    const { address, blockHash, blockNumber, era, genesisHash, method, nonce, runtimeVersion: { specVersion, transactionVersion }, tip, version } = this;
 
     return {
       address: address.toString(),
@@ -61,6 +61,7 @@ export default class SignerPayload extends _Payload implements ISignerPayload {
       nonce: nonce.toHex(),
       specVersion: specVersion.toHex(),
       tip: tip.toHex(),
+      transactionVersion: transactionVersion.toHex(),
       version: version.toNumber()
     };
   }
diff --git a/packages/types/src/extrinsic/signedExtensions/substrate.ts b/packages/types/src/extrinsic/signedExtensions/substrate.ts
index b31d4459fe..7574c14b63 100644
--- a/packages/types/src/extrinsic/signedExtensions/substrate.ts
+++ b/packages/types/src/extrinsic/signedExtensions/substrate.ts
@@ -35,6 +35,18 @@ export default {
       nonce: 'Compact<Index>'
     }
   },
+  CheckSpecVersion: {
+    extra: {
+      specVersion: 'u32'
+    },
+    types: {}
+  },
+  CheckTxVersion: {
+    extra: {
+      transactionVersion: 'u32'
+    },
+    types: {}
+  },
   CheckVersion: {
     extra: {
       specVersion: 'u32'
diff --git a/packages/types/src/extrinsic/v1/ExtrinsicSignature.ts b/packages/types/src/extrinsic/v1/ExtrinsicSignature.ts
index 6573e285d9..03d11e6e0c 100644
--- a/packages/types/src/extrinsic/v1/ExtrinsicSignature.ts
+++ b/packages/types/src/extrinsic/v1/ExtrinsicSignature.ts
@@ -131,8 +131,10 @@ export default class ExtrinsicSignatureV1 extends Struct implements IExtrinsicSi
       genesisHash,
       method: method.toHex(),
       nonce,
-      specVersion: 0, // unused for v1, added for compat
-      tip: 0
+      // unused for v1, added for compat
+      specVersion: 0,
+      tip: 0,
+      transactionVersion: 0
     });
   }
 
diff --git a/packages/types/src/extrinsic/v2/Extrinsic.spec.ts b/packages/types/src/extrinsic/v2/Extrinsic.spec.ts
index ce3a12ff83..ca4c659852 100644
--- a/packages/types/src/extrinsic/v2/Extrinsic.spec.ts
+++ b/packages/types/src/extrinsic/v2/Extrinsic.spec.ts
@@ -58,7 +58,8 @@ describe('ExtrinsicV2', (): void => {
           implName: 'test',
           implVersion: new BN(123),
           specName: 'test',
-          specVersion: new BN(123)
+          specVersion: new BN(123),
+          transactionVersion: new BN(123)
         },
         tip: 2
       }).toHex()
diff --git a/packages/types/src/extrinsic/v2/ExtrinsicSignature.ts b/packages/types/src/extrinsic/v2/ExtrinsicSignature.ts
index e6684567f9..cc3f5cf4ca 100644
--- a/packages/types/src/extrinsic/v2/ExtrinsicSignature.ts
+++ b/packages/types/src/extrinsic/v2/ExtrinsicSignature.ts
@@ -127,8 +127,10 @@ export default class ExtrinsicSignatureV2 extends Struct implements IExtrinsicSi
       genesisHash,
       method: method.toHex(),
       nonce,
-      specVersion: 0, // unused for v2
-      tip: tip || 0
+      // unused for v2
+      specVersion: 0,
+      tip: tip || 0,
+      transactionVersion: 0
     });
   }
 
diff --git a/packages/types/src/extrinsic/v3/Extrinsic.spec.ts b/packages/types/src/extrinsic/v3/Extrinsic.spec.ts
index 59facba126..2c6d382ca6 100644
--- a/packages/types/src/extrinsic/v3/Extrinsic.spec.ts
+++ b/packages/types/src/extrinsic/v3/Extrinsic.spec.ts
@@ -58,7 +58,8 @@ describe('ExtrinsicV3', (): void => {
           implName: 'test',
           implVersion: new BN(123),
           specName: 'test',
-          specVersion: new BN(123)
+          specVersion: new BN(123),
+          transactionVersion: new BN(123)
         },
         tip: 2
       }).toHex()
diff --git a/packages/types/src/extrinsic/v3/ExtrinsicSignature.ts b/packages/types/src/extrinsic/v3/ExtrinsicSignature.ts
index fa0c387f7b..5f0b4f1f41 100644
--- a/packages/types/src/extrinsic/v3/ExtrinsicSignature.ts
+++ b/packages/types/src/extrinsic/v3/ExtrinsicSignature.ts
@@ -39,7 +39,8 @@ export default class ExtrinsicSignatureV3 extends ExtrinsicSignatureV2 {
       method: method.toHex(),
       nonce,
       specVersion,
-      tip: tip || 0
+      tip: tip || 0,
+      transactionVersion: 0
     });
   }
 
diff --git a/packages/types/src/extrinsic/v4/Extrinsic.spec.ts b/packages/types/src/extrinsic/v4/Extrinsic.spec.ts
index fe0072b84a..5ed5d04769 100644
--- a/packages/types/src/extrinsic/v4/Extrinsic.spec.ts
+++ b/packages/types/src/extrinsic/v4/Extrinsic.spec.ts
@@ -58,7 +58,8 @@ describe('ExtrinsicV4', (): void => {
           implName: 'test',
           implVersion: new BN(123),
           specName: 'test',
-          specVersion: new BN(123)
+          specVersion: new BN(123),
+          transactionVersion: new BN(123)
         },
         tip: 2
       }).toHex()
diff --git a/packages/types/src/extrinsic/v4/ExtrinsicPayload.ts b/packages/types/src/extrinsic/v4/ExtrinsicPayload.ts
index 0249fab22f..ffd4263d7d 100644
--- a/packages/types/src/extrinsic/v4/ExtrinsicPayload.ts
+++ b/packages/types/src/extrinsic/v4/ExtrinsicPayload.ts
@@ -76,6 +76,13 @@ export default class ExtrinsicPayloadV4 extends Struct {
     return this.get('tip') as Compact<Balance>;
   }
 
+  /**
+   * @description The transactionVersion for this signature
+   */
+  public get transactionVersion (): u32 {
+    return this.get('transactionVersion') as u32;
+  }
+
   /**
    * @description Sign the payload with the keypair
    */
diff --git a/packages/types/src/extrinsic/v4/ExtrinsicSignature.ts b/packages/types/src/extrinsic/v4/ExtrinsicSignature.ts
index 1c46c02de6..6cea70f19a 100644
--- a/packages/types/src/extrinsic/v4/ExtrinsicSignature.ts
+++ b/packages/types/src/extrinsic/v4/ExtrinsicSignature.ts
@@ -125,7 +125,7 @@ export default class ExtrinsicSignatureV4 extends Struct implements IExtrinsicSi
   /**
    * @description Creates a payload from the supplied options
    */
-  public createPayload (method: Call, { blockHash, era, genesisHash, nonce, runtimeVersion: { specVersion }, tip }: SignatureOptions): ExtrinsicPayloadV4 {
+  public createPayload (method: Call, { blockHash, era, genesisHash, nonce, runtimeVersion: { specVersion, transactionVersion }, tip }: SignatureOptions): ExtrinsicPayloadV4 {
     return new ExtrinsicPayloadV4(this.registry, {
       blockHash,
       era: era || IMMORTAL_ERA,
@@ -133,7 +133,8 @@ export default class ExtrinsicSignatureV4 extends Struct implements IExtrinsicSi
       method: method.toHex(),
       nonce,
       specVersion,
-      tip: tip || 0
+      tip: tip || 0,
+      transactionVersion: transactionVersion || 0
     });
   }
 
diff --git a/packages/types/src/types/extrinsic.ts b/packages/types/src/types/extrinsic.ts
index f1c4d87442..72f60b8383 100644
--- a/packages/types/src/types/extrinsic.ts
+++ b/packages/types/src/types/extrinsic.ts
@@ -82,6 +82,7 @@ export interface ExtrinsicPayloadValue {
   nonce: AnyNumber;
   specVersion: AnyNumber;
   tip: AnyNumber;
+  transactionVersion: AnyNumber;
 }
 
 // eslint-disable-next-line @typescript-eslint/interface-name-prefix
@@ -165,6 +166,11 @@ export interface SignerPayloadJSON {
    */
   tip: string;
 
+  /**
+   * @description The current transaction version for the runtime
+   */
+  transactionVersion: string;
+
   /**
    * @description The version of the extrinsic we are dealing with
    */
diff --git a/packages/types/src/types/interfaces.ts b/packages/types/src/types/interfaces.ts
index ae1903b2d8..60b4bc9693 100644
--- a/packages/types/src/types/interfaces.ts
+++ b/packages/types/src/types/interfaces.ts
@@ -42,6 +42,7 @@ export interface IRuntimeVersion {
   // eslint-disable-next-line @typescript-eslint/ban-types
   readonly specName: String;
   readonly specVersion: BN;
+  readonly transactionVersion: BN;
 }
 
 // A type alias for [Type1, Type2] & Codec, representing a tuple (Type1, Type2)