diff --git a/app/views/bikes/new.html.haml b/app/views/bikes/new.html.haml
index 75f8c77..3f65132 100644
--- a/app/views/bikes/new.html.haml
+++ b/app/views/bikes/new.html.haml
@@ -6,7 +6,7 @@
   .col-xs-12.col-sm-6.col-lg-4
     %fieldset
       .form-group
-        = number_field_tag '', '', id: 'shop_id', placeholder: 'Shop ID', min: 0, class: 'form-control'
+        = number_field_tag nil, nil, id: 'shop_id', placeholder: 'Shop ID', min: 0, class: 'form-control'
         .help-block
 
       .form-group
@@ -14,11 +14,11 @@
         .help-block
 
       .form-group
-        = text_field_tag '', '', id: 'model', placeholder: 'Model', class: 'form-control'
+        = text_field_tag nil, nil, id: 'model', placeholder: 'Model', class: 'form-control'
         .help-block
 
       .form-group
-        = text_field_tag '', '', id: 'serial_number', placeholder: 'Serial Number', class: 'form-control'
+        = text_field_tag nil, nil, id: 'serial_number', placeholder: 'Serial Number', class: 'form-control'
         .help-block
 
       .form-group
@@ -35,7 +35,7 @@
           %label.btn.btn-default
             = radio_button_tag 'bike_style', 4
             OTHER
-        = hidden_field_tag '', '', id: 'bike_style_id'
+        = hidden_field_tag nil, nil, id: 'bike_style_id'
         .help-block
 
       .form-group
@@ -56,12 +56,12 @@
           %label.btn.btn-default
             = radio_button_tag 'bike_condition', 5
             Excellent
-        = hidden_field_tag '', '', id: 'bike_condition_id'
+        = hidden_field_tag nil, nil, id: 'bike_condition_id'
         .help-block
 
       .form-group
         .input-group
-          = number_field_tag '', '', id: 'seat_tube_height', placeholder: 'Seat Tube', min: 0, max: 100, class: "form-control"
+          = number_field_tag nil, nil, id: 'seat_tube_height', placeholder: 'Seat Tube', min: 0, max: 100, class: "form-control"
           .input-group-addon cm
         .help-block
 
diff --git a/app/views/task_lists/edit.haml b/app/views/task_lists/edit.haml
index 1502f78..b67bf06 100644
--- a/app/views/task_lists/edit.haml
+++ b/app/views/task_lists/edit.haml
@@ -13,7 +13,7 @@
     - @task_list.tasks.each do |task|
       .checkbox
         %label
-          = check_box_tag '', '', task.done, class: 'task_list_task', type: 'checkbox', "data-id": task.id
+          = check_box_tag nil, nil, task.done, class: 'task_list_task', type: 'checkbox', "data-id": task.id
           = task.task
 
   .form-group
diff --git a/app/views/time_entries/new.haml b/app/views/time_entries/new.haml
index d95d0b3..88629ce 100644
--- a/app/views/time_entries/new.haml
+++ b/app/views/time_entries/new.haml
@@ -12,7 +12,7 @@
       .form-group.bootstrap-timepicker.form-inline
         .form-group
           %label.visible-xs Start time
-          = text_field_tag '', '', id: 'start_time_id', placeholder: 'Start time', class: 'form-control', size: 8
+          = text_field_tag nil, nil, id: 'start_time_id', placeholder: 'Start time', class: 'form-control', size: 8
           .hidden#start_date
           .help-block
 
@@ -21,7 +21,7 @@
 
         .form-group
           %label.visible-xs End time
-          = text_field_tag '', '', id: 'end_time_id', placeholder: 'End time', class: 'form-control', size: 8
+          = text_field_tag nil, nil, id: 'end_time_id', placeholder: 'End time', class: 'form-control', size: 8
           .hidden#end_date
           .help-block
 
@@ -43,7 +43,7 @@
         = select_tag :bike_id, options_for_select(@bikes), class: 'form-control'
 
       .form-group
-        = text_area_tag '', '', id: 'description_id', placeholder: 'Work description', class: 'form-control', rows: 5
+        = text_area_tag nil, nil, id: 'description_id', placeholder: 'Work description', class: 'form-control', rows: 5
 
       .control-group
         .controls