diff --git a/api/starknet_ws_api.json b/api/starknet_ws_api.json
index fb93e23..109fb1e 100644
--- a/api/starknet_ws_api.json
+++ b/api/starknet_ws_api.json
@@ -29,6 +29,9 @@
       "errors": [
         {
           "$ref": "#/components/errors/TOO_MANY_BLOCKS_BACK"
+        },
+        {
+          "$ref": "./api/starknet_api_openrpc.json#/components/schemas/BLOCK_NOT_FOUND"
         }
       ]
     },
@@ -95,6 +98,9 @@
         },
         {
           "$ref": "#/components/errors/TOO_MANY_BLOCKS_BACK"
+        },
+        {
+          "$ref": "./api/starknet_api_openrpc.json#/components/schemas/BLOCK_NOT_FOUND"
         }
       ]
     },
@@ -149,6 +155,9 @@
       "errors": [
         {
           "$ref": "#/components/errors/TOO_MANY_BLOCKS_BACK"
+        },
+        {
+          "$ref": "./api/starknet_api_openrpc.json#/components/schemas/BLOCK_NOT_FOUND"
         }
       ]
     },