diff --git a/shard.yml b/shard.yml
index cd3a775..d226c66 100644
--- a/shard.yml
+++ b/shard.yml
@@ -8,6 +8,6 @@ description: |
   High-level Crystal bindings to libipc.
 
 libraries:
-  libipc: >= 0.1
+  libipc: ">= 0.1"
 
 license: MIT