diff --git a/Gemfile.lock b/Gemfile.lock
index 2cb0444..44a042a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,14 +3,14 @@ GEM
   specs:
     kramdown (2.5.1)
       rexml (>= 3.3.9)
-    power_assert (2.0.5)
+    power_assert (3.0.0)
     prettier_print (1.2.1)
     rake (13.3.1)
     rexml (3.3.9)
     rouge (4.6.1)
     syntax_tree (6.3.0)
       prettier_print (>= 1.2.0)
-    test-unit (3.7.0)
+    test-unit (3.7.1)
       power_assert
 
 PLATFORMS