diff --git a/Gemfile b/Gemfile
index 1920f53..1957b9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,5 +5,5 @@ gem "multi_json"
 
 group :development do
   gem "rspec", "~> 2.8.0"
-  gem "rdoc", "~> 6.3.1"
+  gem "rdoc", "~> 6.3.4"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 3fba662..5fbea25 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     mime-types-data (3.2020.0512)
     multi_json (1.14.1)
     netrc (0.11.0)
-    rdoc (6.3.1)
+    rdoc (6.3.4.1)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
@@ -37,7 +37,7 @@ PLATFORMS
 DEPENDENCIES
   json (~> 2.3.0)
   multi_json
-  rdoc (~> 6.3.1)
+  rdoc (~> 6.3.4)
   rest-client
   rspec (~> 2.8.0)