diff --git a/core/src/main/resources/openapi/web3signer-eth2.yaml b/core/src/main/resources/openapi/web3signer-eth2.yaml
index 1000393a9..a1084e999 100644
--- a/core/src/main/resources/openapi/web3signer-eth2.yaml
+++ b/core/src/main/resources/openapi/web3signer-eth2.yaml
@@ -533,6 +533,8 @@ components:
       properties:
         version:
           type: string
+          description: 'version to identify block request type.'
+          example: PHASE0
         block:
           $ref: "#/components/schemas/BeaconBlock"
       required:
@@ -543,6 +545,8 @@ components:
       properties:
         version:
           type: string
+          description: 'version to identify block request type.'
+          example: ALTAIR
         block:
           $ref: "#/components/schemas/BeaconBlockAltair"
       required: