diff --git a/shard.yml b/shard.yml
index 75230b9..5dcc609 100644
--- a/shard.yml
+++ b/shard.yml
@@ -9,6 +9,6 @@ description: |
     High-level Crystal bindings to libipc.
 
 libraries:
-  libipc: ">= 0.5"
+  libipc: ">= 0.6"
 
 license: ISC