diff --git a/source/app/main.ini b/source/app/main.ini
index 59b7c0e..3fec15c 100644
--- a/source/app/main.ini
+++ b/source/app/main.ini
@@ -8,5 +8,6 @@ callable = app
 master = true
 processes = 4
 threads = 4
+thunder-lock = true
 #~ stats = 127.0.0.1:9191
 logger = file:/srv/log/empresalibre-uwsgi.log
diff --git a/source/static/img/file-email.png b/source/static/img/file-email.png
index b655a0b..d4cafd2 100644
Binary files a/source/static/img/file-email.png and b/source/static/img/file-email.png differ
diff --git a/source/static/img/file-pdf.png b/source/static/img/file-pdf.png
index e8fbe0e..6c6f519 100644
Binary files a/source/static/img/file-pdf.png and b/source/static/img/file-pdf.png differ
diff --git a/source/static/img/file-xml.png b/source/static/img/file-xml.png
index 1fa648e..3f1d241 100644
Binary files a/source/static/img/file-xml.png and b/source/static/img/file-xml.png differ
diff --git a/source/static/img/file-zip.png b/source/static/img/file-zip.png
index 15175ac..b96e8d7 100644
Binary files a/source/static/img/file-zip.png and b/source/static/img/file-zip.png differ
diff --git a/source/static/js/ui/invoices.js b/source/static/js/ui/invoices.js
index 1cdcb61..950baf1 100644
--- a/source/static/js/ui/invoices.js
+++ b/source/static/js/ui/invoices.js
@@ -18,7 +18,7 @@ var toolbar_invoices_util = [
 
 
 function get_icon(tipo){
-    var node = "<img src='/static/img/file-" + tipo + ".png' height='20' width='20' style='margin: 5px 0px'/>"
+    var node = "<img src='/static/img/file-" + tipo + ".png' height='20' width='17' style='margin: 5px 0px'/>"
     return node
 }