diff --git a/lib/neography/rest.rb b/lib/neography/rest.rb
index 1886d53..4ed60f8 100644
--- a/lib/neography/rest.rb
+++ b/lib/neography/rest.rb
@@ -347,8 +347,8 @@ def create_relationship_auto_index(type = "exact", provider = "lucene")
       @relationship_indexes.create_auto(type, provider)
     end
 
-    def create_unique_relationship(index, key, value, type, from, to)
-      @relationship_indexes.create_unique(index, key, value, type, from, to)
+    def create_unique_relationship(index, key, value, type, from, to, props)
+      @relationship_indexes.create_unique(index, key, value, type, from, to, props)
     end
 
     def add_relationship_to_index(index, key, value, id)
diff --git a/lib/neography/rest/relationship_indexes.rb b/lib/neography/rest/relationship_indexes.rb
index b0a2aa6..7d0fb4a 100644
--- a/lib/neography/rest/relationship_indexes.rb
+++ b/lib/neography/rest/relationship_indexes.rb
@@ -17,13 +17,14 @@ def initialize(connection)
         super(connection, :relationship)
       end
 
-      def create_unique(index, key, value, type, from, to)
+      def create_unique(index, key, value, type, from, to, props)
         body = {
           :key   => key,
           :value => value,
           :type  => type,
           :start => @connection.configuration + "/node/#{get_id(from)}",
-          :end   => @connection.configuration + "/node/#{get_id(to)}"
+          :end   => @connection.configuration + "/node/#{get_id(to)}",
+          :properties => props
         }
         options = { :body => body.to_json, :headers => json_content_type }