diff --git a/Gemfile.lock b/Gemfile.lock
index 53b1ed6..765f85a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,19 +76,19 @@ GEM
     require_all (2.0.0)
     reverse_markdown (1.3.0)
       nokogiri
-    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)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.0)
+      rspec-support (~> 3.9.0)
+    rspec-expectations (3.9.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.1)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-support (3.8.2)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.0)
     rubocop (0.75.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)