[RubyVersion] Keep versions as strings

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/bundler/ruby_version.rb b/lib/bundler/ruby_version.rb
index 6fd65b5c12..f0a001d296 100644
--- a/lib/bundler/ruby_version.rb
+++ b/lib/bundler/ruby_version.rb
@@ -21,7 +21,11 @@ module Bundler
       #   must not be specified, or the engine version
       #   specified must match the version.
 
-      @versions           = Array(versions).map {|v| Gem::Requirement.parse(v).last }
+      @versions = Array(versions).map do |v|
+        op, v = Gem::Requirement.parse(v)
+        op == "=" ? v.to_s : "#{op} #{v}"
+      end
+
       @gem_version        = Gem::Requirement.create(@versions.first).requirements.first.last
       @input_engine       = engine && engine.to_s
       @engine             = engine && engine.to_s || "ruby"