diff --git a/Gemfile.lock b/Gemfile.lock
index 8233cc7..2b23ae8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,11 +10,11 @@ GEM
     ast (2.4.0)
     byebug (11.0.0)
     coderay (1.1.2)
-    coveralls (0.8.22)
+    coveralls (0.8.23)
       json (>= 1.8, < 3)
       simplecov (~> 0.16.1)
       term-ansicolor (~> 1.3)
-      thor (~> 0.19.4)
+      thor (>= 0.19.4, < 2.0)
       tins (~> 1.6)
     diff-lcs (1.3)
     docile (1.3.1)
@@ -37,7 +37,7 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     hashie (3.6.0)
     jaro_winkler (1.5.2)
-    json (2.1.0)
+    json (2.2.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -94,10 +94,10 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    term-ansicolor (1.6.0)
+    term-ansicolor (1.7.1)
       tins (~> 1.0)
-    thor (0.19.4)
-    tins (1.16.3)
+    thor (0.20.3)
+    tins (1.20.3)
     unicode-display_width (1.4.1)
 
 PLATFORMS