diff --git a/Gemfile b/Gemfile
index 9311a90..6bb3a7c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,6 +22,8 @@ gem "redis", "~> 4.7.0"
 # Report GC usage data to StatsD with 'barnes' gem so that Heroku can monitor
 gem "barnes"
 
+gem "wkhtmltopdf-binary", "0.12.6.6"
+
 group :development, :test do
   gem "byebug", platform: :mri
   gem "decidim-dev", DECIDIM_VERSION
diff --git a/Gemfile.lock b/Gemfile.lock
index 2087b2a..aadb3c1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -821,7 +821,7 @@ GEM
       activesupport
     wisper (2.0.1)
     wisper-rspec (1.1.0)
-    wkhtmltopdf-binary (0.12.6.7)
+    wkhtmltopdf-binary (0.12.6.6)
     xpath (3.2.0)
       nokogiri (~> 1.8)
     zeitwerk (2.6.12)
@@ -858,6 +858,7 @@ DEPENDENCIES
   spring
   spring-watcher-listen (~> 2.0.0)
   web-console
+  wkhtmltopdf-binary (= 0.12.6.6)
 
 RUBY VERSION
    ruby 3.1.1p18