diff --git a/shard.yml b/shard.yml
index 5ed3786..d918118 100644
--- a/shard.yml
+++ b/shard.yml
@@ -7,6 +7,7 @@ dependencies:
     github: kostya/cron_parser
   future:
     github: crystal-community/future.cr
+    version: ~> 1.0.0
 
 development_dependencies:
   ameba: