diff --git a/specification/keyvault/data-plane/Microsoft.KeyVault/preview/7.3-preview/keys.json b/specification/keyvault/data-plane/Microsoft.KeyVault/preview/7.3-preview/keys.json
index 2ce0bd794955..87453b94bff0 100644
--- a/specification/keyvault/data-plane/Microsoft.KeyVault/preview/7.3-preview/keys.json
+++ b/specification/keyvault/data-plane/Microsoft.KeyVault/preview/7.3-preview/keys.json
@@ -1139,7 +1139,7 @@
       "properties": {
         "bytesLength": {
           "type": "integer",
-          "format": "int32",
+          "format": "uint32",
           "minimum": 1,
           "maximum": 128,
           "description": "The requested number of random bytes."