diff --git a/lib/bundler/fetcher/compact_index.rb b/lib/bundler/fetcher/compact_index.rb
index 674d2b49f1..f9db920c32 100644
--- a/lib/bundler/fetcher/compact_index.rb
+++ b/lib/bundler/fetcher/compact_index.rb
@@ -44,7 +44,7 @@ module Bundler
                    @bundle_worker = nil # reset it.  Not sure if necessary
                    serial_compact_index_client.dependencies(remaining_gems)
                  end
-          next_gems = deps.map {|d| d[3].map(&:first).flatten(1) }.flatten(1).uniq
+          next_gems = deps.flat_map {|d| d[3].flat_map(&:first) }.uniq
           deps.each {|dep| gem_info << dep }
           complete_gems.concat(deps.map(&:first)).uniq!
           remaining_gems = next_gems - complete_gems
diff --git a/lib/bundler/rubygems_integration.rb b/lib/bundler/rubygems_integration.rb
index d8b7886af7..1bcfdf56ff 100644
--- a/lib/bundler/rubygems_integration.rb
+++ b/lib/bundler/rubygems_integration.rb
@@ -91,9 +91,9 @@ module Bundler
     def spec_matches_for_glob(spec, glob)
       return spec.matches_for_glob(glob) if spec.respond_to?(:matches_for_glob)
 
-      spec.load_paths.map do |lp|
+      spec.load_paths.flat_map do |lp|
         Dir["#{lp}/#{glob}#{suffix_pattern}"]
-      end.flatten(1)
+      end
     end
 
     def stub_set_spec(stub, spec)