diff --git a/api/doc/thor.yaml b/api/doc/thor.yaml
index 477c589dc..6487a9b39 100644
--- a/api/doc/thor.yaml
+++ b/api/doc/thor.yaml
@@ -2149,7 +2149,7 @@ components:
           example: '0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0'
           required: true
           nullable: false
-          pattern: '(0x)?[0-9a-fA-F]{64}\/(0x)?([0-9]+|[0-9a-fA-F]+|[a-fA-F]+)\/[0-9]+$'
+          pattern: '^0x[0-9a-fA-F]{64}\/(0x[0-9a-fA-F]{64}|\d+)\/[0-9]+$'
       example:
         target: '0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0'
 
@@ -2221,7 +2221,7 @@ components:
             `blockID/(txIndex|txId)/clauseIndex`
           required: true
           nullable: false
-          pattern: '(0x)?[0-9a-fA-F]{64}\/(0x)?([0-9]+|[0-9a-fA-F]+|[a-fA-F]+)\/[0-9]+$'
+          pattern: '^0x[0-9a-fA-F]{64}\/(0x[0-9a-fA-F]{64}|\d+)\/[0-9]+$'
 
     StorageRange:
       type: object