diff --git a/packages/pgroll/src/schema.ts b/packages/pgroll/src/schema.ts
index a374edbdc..cdc3ce5b9 100644
--- a/packages/pgroll/src/schema.ts
+++ b/packages/pgroll/src/schema.ts
@@ -272,6 +272,10 @@ export const schema = {
         storage_parameters: {
           description: 'Storage parameters for the index',
           type: 'string'
+        },
+        unique: {
+          description: 'Indicates if the index is unique',
+          type: 'boolean'
         }
       },
       required: ['columns', 'name', 'table'],
diff --git a/packages/pgroll/src/types.ts b/packages/pgroll/src/types.ts
index 0abadbf84..96d3126bc 100644
--- a/packages/pgroll/src/types.ts
+++ b/packages/pgroll/src/types.ts
@@ -67,7 +67,8 @@ export const OpCreateIndexDefinition = z.object({
   table: z.string(),
   predicate: z.string().optional(),
   method: z.string().optional(),
-  storage_parameters: z.string().optional()
+  storage_parameters: z.string().optional(),
+  unique: z.boolean().optional()
 });
 
 export type OpCreateTable = z.infer<typeof OpCreateTableDefinition>;