diff --git a/README.md b/README.md
index 27a33445b9dc0d57e8e61975f6b225cd6f92e82e..a3bd8e1e120d2f341b8f2dad144ee545bd6d37cb 100644
--- a/README.md
+++ b/README.md
@@ -122,7 +122,6 @@ db.createCollection("referential_levels")
 
 # créer les index sur la collection
 db.referential_levels.createIndex(
-  {
     { id: 1 },
     { name: 'id_1',
       unique: true,
@@ -138,9 +137,8 @@ db.referential_levels.createIndex(
           backwards: false,
       }
   }
-  })
+)
 db.referential_levels.createIndex( 
-  {
     { referential_id: 1, order: 1 },
     { name: 'referential_id_1_order_1',
       collation: {
@@ -155,14 +153,13 @@ db.referential_levels.createIndex(
           backwards: false,
     }
   }
-})
+)
 
 # créer la collection referential_nodes
 db.createCollection("referential_nodes")
 
 # créer les index sur la collection
 db.referential_nodes.createIndex(
-  {
     { id: 1 },
     { name: 'id_1',
       unique: true,
@@ -178,10 +175,9 @@ db.referential_nodes.createIndex(
           backwards: false,
       }
   }
-})
+)
 
 db.referential_nodes.createIndex(
-  {
     { referential_id: 1, level_id: 1, ancestors: 1, order: 1 },
     { name: 'referential_id_1_level_id_1_ancestors_1_order_1',
       collation: {
@@ -196,7 +192,7 @@ db.referential_nodes.createIndex(
           backwards: false,
       }
     }
-})
+)
 
 ```