diff --git a/Gemfile b/Gemfile
index 2e84117..28e5797 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ source "https://rubygems.org"
 gemspec
 
 gem "canon"
-gem "lutaml-model", github: "lutaml/lutaml-model", branch: "fix/global-context-register-lookup-fallback"
+gem "lutaml-model", github: "lutaml/lutaml-model", branch: "main"
 gem "nokogiri"
 gem "rake"
 gem "rspec"
diff --git a/unitsdb.gemspec b/unitsdb.gemspec
index 32723fb..fbf61a6 100644
--- a/unitsdb.gemspec
+++ b/unitsdb.gemspec
@@ -34,6 +34,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "fuzzy_match"
+  spec.add_dependency "logger"
   spec.add_dependency "lutaml-model", "~> 0.8.0"
   spec.add_dependency "rdf", "~> 3.1"
   spec.add_dependency "rdf-turtle", "~> 3.1"