diff --git a/Gemfile.lock b/Gemfile.lock
index dc7569a..3255982 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,31 +2,31 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    docile (1.1.5)
-    json (2.1.0)
-    rake (12.3.1)
-    rdoc (5.1.0)
+    docile (1.3.2)
+    json (2.2.0)
+    rake (12.3.2)
+    rdoc (6.1.1)
     redcarpet (3.4.0)
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
+    rspec (3.8.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+    rspec-core (3.8.2)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.4)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.2)
     simplecov (0.15.0)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     syntax (1.2.2)
-    yard (0.9.12)
+    yard (0.9.20)
 
 PLATFORMS
   ruby
@@ -43,4 +43,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-   1.16.2
+   1.17.3