diff --git a/pkgs/development/tools/language-servers/crystalline/default.nix b/pkgs/development/tools/language-servers/crystalline/default.nix
index 7e0bc27faceb..779bb27f9976 100644
--- a/pkgs/development/tools/language-servers/crystalline/default.nix
+++ b/pkgs/development/tools/language-servers/crystalline/default.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-  version = "0.10.0";
+  version = "0.12.1";
 in
 crystal.buildCrystalPackage {
   pname = "crystalline";
@@ -17,7 +17,7 @@ crystal.buildCrystalPackage {
     owner = "elbywan";
     repo = "crystalline";
     rev = "v${version}";
-    hash = "sha256-g4k/vP7yYbTAy2bTAfr6HQhkskWfI6Zv2lxP+AZf6yw=";
+    hash = "sha256-b/j1V5JlT+rjWYAA8nrE0PWHrzQq4rUZxZlADMmtpBk=";
   };
 
   format = "crystal";