diff --git a/Gemfile.lock b/Gemfile.lock
index a14eab4..0bfe7cd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
     parser (3.3.10.0)
       ast (~> 2.4.1)
       racc
-    power_assert (2.0.5)
+    power_assert (3.0.1)
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
@@ -134,7 +134,7 @@ GEM
     rubyzip (2.4.1)
     semver2 (3.4.2)
     stringio (3.1.7)
-    test-unit (3.7.0)
+    test-unit (3.7.1)
       power_assert
     thor (1.4.0)
     thread_safe (0.3.6)