diff --git a/shard.yml b/shard.yml
index 1c18324..8510b9d 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: protodec
-version: 0.1.3
+version: 0.1.4
 
 authors:
   - Omar Roth <omarroth@protonmail.com>
@@ -8,6 +8,6 @@ targets:
   protodec:
     main: src/protodec.cr
 
-crystal: 0.34.0
+crystal: ">= 0.34.0, < 2.0.0"
 
 license: GPLv3