diff --git a/Gemfile.lock b/Gemfile.lock
index bec78fd..54b5519 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,15 +7,15 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.3)
-    date (3.5.0)
+    date (3.5.1)
     debug (1.11.0)
       irb (~> 1.10)
       reline (>= 0.3.8)
     diff-lcs (1.6.2)
     docile (1.4.1)
-    erb (6.0.0)
-    io-console (0.8.1)
-    irb (1.15.3)
+    erb (6.0.1)
+    io-console (0.8.2)
+    irb (1.16.0)
       pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
@@ -30,13 +30,13 @@ GEM
       prettyprint
     prettyprint (0.2.0)
     prism (1.6.0)
-    psych (5.2.6)
+    psych (5.3.1)
       date
       stringio
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.3.1)
-    rdoc (6.16.1)
+    rdoc (7.0.1)
       erb
       psych (>= 4.0.0)
       tsort
@@ -77,7 +77,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
-    stringio (3.1.9)
+    stringio (3.2.0)
     tsort (0.2.0)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)