diff --git a/Gemfile.lock b/Gemfile.lock
index f641b90..ee2cfcf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,18 +24,18 @@ GEM
     bump (0.6.1)
     coderay (1.1.2)
     concurrent-ruby (1.1.7)
-    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)
+    docile (1.3.2)
     ffi (1.13.1)
     i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.3.1)
     listen (3.3.3)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -87,11 +87,13 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    term-ansicolor (1.7.0)
+    sync (0.5.0)
+    term-ansicolor (1.7.1)
       tins (~> 1.0)
-    thor (0.19.4)
+    thor (1.0.1)
     thread_safe (0.3.6)
-    tins (1.20.2)
+    tins (1.26.0)
+      sync
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
     unicode-display_width (1.4.0)