diff --git a/Gemfile b/Gemfile
index 2880c5b9a..1226fb74f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -51,7 +51,7 @@ gem 'commit_param_routing' # Enables different submit actions in the same form t
 gem 'kaminari'
 gem 'i18n-js', '~> 3.0' # Localization in javascript files
 gem 'roo', '~> 2.7.1' # Spreadsheet parser
-gem 'wicked_pdf'
+gem 'wicked_pdf', '~> 1.0.6'
 gem 'silencer' # Silence certain Rails logs
 gem 'wkhtmltopdf-heroku'
 gem 'remotipart', '~> 1.2' # Async file uploads
diff --git a/Gemfile.lock b/Gemfile.lock
index 501eeab73..d47fa8aa8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -448,7 +448,7 @@ GEM
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)
     whacamole (1.2.0)
-    wicked_pdf (1.1.0)
+    wicked_pdf (1.0.6)
     wkhtmltopdf-heroku (2.12.4.0)
     xpath (2.1.0)
       nokogiri (~> 1.3)
@@ -546,7 +546,7 @@ DEPENDENCIES
   uglifier (>= 1.3.0)
   underscore-rails
   whacamole
-  wicked_pdf
+  wicked_pdf (~> 1.0.6)
   wkhtmltopdf-heroku
   yomu