Gemfile.lock in ruby_lambda-0.3.2 vs Gemfile.lock in ruby_lambda-0.4.0

@@ -1,10 +1,11 @@
 PATH
   remote: .
   specs:
-    ruby_lambda (0.3.2)
+    ruby_lambda (0.4.0)
       awesome_print (~> 1.8.0)
+      rubyzip (~> 1.2)
       thor (~> 0.19)
 
 GEM
   remote: https://rubygems.org/
   specs:
@@ -58,9 +59,10 @@
     rspec-mocks (3.8.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
     ruby_dep (1.5.0)
+    rubyzip (1.2.2)
     shellany (0.0.1)
     simplecov (0.16.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)