diff --git a/paneron-register.gemspec b/paneron-register.gemspec
index 8c6be0f..a568cf4 100644
--- a/paneron-register.gemspec
+++ b/paneron-register.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   # spec.add_runtime_dependency "yaml"
 
   spec.add_runtime_dependency "git", "~> 2.3.1"
-  spec.add_runtime_dependency "lutaml-model", "~> 0.3.18"
+  spec.add_runtime_dependency "lutaml-model", "~> 0.5.3"
   spec.add_runtime_dependency "uuid", "~> 2.3.9"
 
   spec.add_development_dependency "debug"