diff --git a/src/schemas/base-types.yaml b/src/schemas/base-types.yaml
index f9ff48ca..d0dc7dd9 100644
--- a/src/schemas/base-types.yaml
+++ b/src/schemas/base-types.yaml
@@ -38,7 +38,7 @@ bytes256:
 bytes65:
   title: 65 hex encoded bytes
   type: string
-  pattern: ^0x[0-9a-f]{65}$
+  pattern: ^0x[0-9a-f]{130}$
 uint:
   title: hex encoded unsigned integer
   type: string