diff --git a/Gemfile b/Gemfile
index 3708561..ffde0aa 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,12 +6,11 @@ source "https://rubygems.org"
 gemspec
 
 gem "canon"
-gem "lutaml-model", github: "lutaml/lutaml-model", branch: "main"
 gem "nokogiri"
 gem "oga"
 gem "opal", "~> 1.8"
 gem "ox"
-gem "plurimath", github: "plurimath/plurimath", branch: "main"
+gem "plurimath", "~> 0.11.3"
 gem "pry"
 gem "rake"
 gem "rspec"