diff --git a/Gemfile.lock b/Gemfile.lock
index 8edaaa8..30a994c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
       simplecov
     concurrent-ruby (1.2.2)
     diff-lcs (1.4.4)
-    docile (1.4.0)
+    docile (1.4.1)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     minitest (5.18.0)
@@ -34,12 +34,12 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.2)
-    simplecov (0.21.2)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
-    simplecov-html (0.12.3)
-    simplecov_json_formatter (0.1.3)
+    simplecov-html (0.13.1)
+    simplecov_json_formatter (0.1.4)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)