diff --git a/Dockerfile b/Dockerfile
index c3fd007..e676f4d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,8 +52,6 @@ RUN find public -type f -name "*.gz" | sed -re "s/\.gz$//" | xargs -r brotli -k
 # assets ya están pre-compilados.
 RUN sed -re "/(uglifier|bootstrap|coffee-rails)/d" -i Gemfile
 RUN bundle clean
-RUN sed -re "s/def visit\(object\)/def visit(object, collection = nil)/" \
-         -i `bundle show mobility`/lib/mobility/arel/visitor.rb
 
 # Contenedor final
 FROM sutty/monit:latest
diff --git a/Gemfile.lock b/Gemfile.lock
index 9d81b2c..cdb6e9d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -226,7 +226,7 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
-    mobility (0.8.7)
+    mobility (0.8.8)
       i18n (>= 0.6.10, < 2)
       request_store (~> 1.0)
     net-scp (2.0.0)