diff --git a/Gemfile b/Gemfile
index 2edd4b99..29c2ab7d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,7 +28,7 @@ gem 'rubytree'
 gem 'sass-rails', '>= 5.0.7'
 gem 'sdoc', group: :doc
 gem 'slim-rails'
-gem 'bootstrap_pagedown'
+gem 'bootstrap_pagedown', '>= 1.1.0'
 gem 'pagedown-rails'
 gem 'sorcery'
 gem 'thread_safe'
diff --git a/Gemfile.lock b/Gemfile.lock
index d286d5eb..262c7687 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -383,7 +383,7 @@ DEPENDENCIES
   better_errors
   binding_of_caller
   bootstrap-will_paginate
-  bootstrap_pagedown
+  bootstrap_pagedown (>= 1.1.0)
   byebug
   capistrano
   capistrano-rails