diff --git a/lib/mock_redis/assertions.rb b/lib/mock_redis/assertions.rb
index cf09bc6..5d3d47c 100644
--- a/lib/mock_redis/assertions.rb
+++ b/lib/mock_redis/assertions.rb
@@ -1,3 +1,4 @@
+require 'redis-client'
 require 'mock_redis/error'
 
 class MockRedis