diff --git a/Gemfile b/Gemfile
index 5bc4f6a..95989b2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,3 @@
 source "https://rubygems.org"
 
-gem "mrubyc-test", "~> 0.5.2"
+gem "mrubyc-test", "~> 0.5.3"
diff --git a/Gemfile.lock b/Gemfile.lock
index ea876af..008edfa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,30 +1,32 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.2)
+    activesupport (6.0.3.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
     concurrent-ruby (1.1.6)
     i18n (1.8.2)
       concurrent-ruby (~> 1.0)
-    minitest (5.14.0)
-    mrubyc-test (0.5.2)
-      activesupport (~> 5.2)
+    minitest (5.14.1)
+    mrubyc-test (0.5.3)
+      activesupport (~> 6.0)
       rufo (~> 0.12)
       thor (~> 1.0)
     rufo (0.12.0)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tzinfo (1.2.6)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
+    zeitwerk (2.3.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  mrubyc-test (~> 0.5.2)
+  mrubyc-test (~> 0.5.3)
 
 BUNDLED WITH
    2.1.4