diff --git a/lib/bundix.rb b/lib/bundix.rb
index 5f86960..1e65cd6 100755
--- a/lib/bundix.rb
+++ b/lib/bundix.rb
@@ -85,10 +85,19 @@ def platforms(spec, dep_cache)
     {platforms: platforms}
   end
 
+  def version(spec)
+    platform = spec.platform
+    if platform == Gem::Platform::RUBY || platform.nil?
+      spec.version.to_s
+    else
+      "#{spec.version}-#{platform}"
+    end
+  end
+
   def convert_spec(spec, cache, dep_cache)
     {
       spec.name => {
-        version: spec.version.to_s,
+        version: version(spec),
         source: Source.new(spec, fetcher).convert
       }.merge(platforms(spec, dep_cache)).merge(groups(spec, dep_cache))
     }
diff --git a/test/convert.rb b/test/convert.rb
index 7de156c..c6d0b5b 100644
--- a/test/convert.rb
+++ b/test/convert.rb
@@ -40,6 +40,7 @@ def test_bundler_dep
     ) do |gemset|
       assert_equal("0.5.0", gemset.dig("bundler-audit", :version))
       assert_equal("0.19.4", gemset.dig("thor", :version))
+      assert_equal("0.4.4821-universal-darwin-14", gemset.dig("sorbet-static", :version))
     end
   end
 end
diff --git a/test/data/bundler-audit/Gemfile b/test/data/bundler-audit/Gemfile
index 89edc2b..97e9c57 100644
--- a/test/data/bundler-audit/Gemfile
+++ b/test/data/bundler-audit/Gemfile
@@ -1,3 +1,4 @@
 source 'https://rubygems.org' do
   gem 'bundler-audit'
+  gem 'sorbet', '= 0.4.4821'
 end
diff --git a/test/data/bundler-audit/Gemfile.lock b/test/data/bundler-audit/Gemfile.lock
index fa8847c..d69a7f9 100644
--- a/test/data/bundler-audit/Gemfile.lock
+++ b/test/data/bundler-audit/Gemfile.lock
@@ -4,6 +4,9 @@ GEM
     bundler-audit (0.5.0)
       bundler (~> 1.2)
       thor (~> 0.18)
+    sorbet (0.4.4821)
+      sorbet-static (= 0.4.4821)
+    sorbet-static (0.4.4821-universal-darwin-14)
     thor (0.19.4)
 
 PLATFORMS
@@ -11,6 +14,7 @@ PLATFORMS
 
 DEPENDENCIES
   bundler-audit!
+  sorbet (= 0.4.4821)!
 
 BUNDLED WITH
    1.12.5