diff --git a/crystal/shard.yml b/crystal/shard.yml
index 9fcba59..ed44751 100644
--- a/crystal/shard.yml
+++ b/crystal/shard.yml
@@ -25,8 +25,8 @@ targets:
 dependencies:
   ipc:
     git: https://git.baguette.netlib.re/Baguette/ipc.cr
-    branch: master
+    branch: main
 
-crystal: 1.8.2
+crystal: 1.18.1
 
 license: ISC