diff --git a/README.md b/README.md
index d81c6b6..484901e 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Functional examples are included in the
 | project\_id | The project ID to create the repository | `string` | n/a | yes |
 | remote\_repository\_config | Configuration specific for a Remote Repository. | <pre>object({<br>    description = optional(string)<br>    apt_repository = optional(object({<br>      public_repository = optional(object({<br>        repository_base = string<br>        repository_path = string<br>      }), null)<br>    }), null)<br>    docker_repository = optional(object({<br>      public_repository = optional(string, "DOCKER_HUB")<br>    }), null)<br>    maven_repository = optional(object({<br>      public_repository = optional(string, "MAVEN_CENTRAL")<br>    }), null)<br>    npm_repository = optional(object({<br>      public_repository = optional(string, "NPMJS")<br>    }), null)<br>    python_repository = optional(object({<br>      public_repository = optional(string, "PYPI")<br>    }), null)<br>    yum_repository = optional(object({<br>      public_repository = optional(object({<br>        repository_base = string<br>        repository_path = string<br>      }), null)<br>    }), null)<br>  })</pre> | `null` | no |
 | repository\_id | The repository name | `string` | n/a | yes |
-| virtual\_repository\_config | Configuration specific for a Virtual Repository. | <pre>object({<br>    upstream_policies = optional(object({<br>      id         = string<br>      repository = string<br>      priority   = number<br>    }), null)<br>  })</pre> | `null` | no |
+| virtual\_repository\_config | Configuration specific for a Virtual Repository. | <pre>object({<br>    upstream_policies = optional(list(object({<br>      id         = string<br>      repository = string<br>      priority   = number<br>    })), null)<br>  })</pre> | `null` | no |
 | vpcsc\_policy | The VPC SC policy for project and location. Possible values are: DENY, ALLOW | `string` | `"ALLOW"` | no |
 
 ## Outputs
diff --git a/variables.tf b/variables.tf
index 29e9489..1c2a670 100644
--- a/variables.tf
+++ b/variables.tf
@@ -77,11 +77,11 @@ variable "maven_config" {
 
 variable "virtual_repository_config" {
   type = object({
-    upstream_policies = optional(object({
+    upstream_policies = optional(list(object({
       id         = string
       repository = string
       priority   = number
-    }), null)
+    })), null)
   })
   description = "Configuration specific for a Virtual Repository."
   default     = null