diff --git a/_templates/7days.txt b/_templates/7days.txt
index 88cd707..b9fcfd5 100644
--- a/_templates/7days.txt
+++ b/_templates/7days.txt
@@ -1,19 +1,19 @@
 #encoding utf8#
 #locale True#
 #timezone local#
-<table border="1" rules="all">
+<table border="1" rules="all" class="mdl-data-table mdl-js-data-table">
   <thead>
     <tr>
-      <th rowspan="2">letzte 24 Std. bis</th>
-      <th colspan="3">Temperatur</th>
-      <th colspan="3">Wind</th>
+      <th rowspan="2" class="mdl-data-table__cell--non-numeric mdl-data-table__header--sorted-ascending">letzte 24 Std. bis</th>
+      <th colspan="3" class="mdl-data-table__cell--non-numeric">Temperatur</th>
+      <th colspan="3" class="mdl-data-table__cell--non-numeric">Wind</th>
       <th rowspan="2">Regenfall</th>
     </tr>
     <tr>
       <th>Tag max.</th>
       <th>Ø</th>
       <th>Nacht min.</th>
-      <th>Ri</th>
+      <th class="mdl-data-table__cell--non-numeric">Ri</th>
       <th>durchschn.</th>
       <th>max. Boe</th>
     </tr>
@@ -23,11 +23,11 @@
 #jump -7#
 #loop 7#
     <tr>
-      <td>#idx "%Y-%m-%d %H:%M %Z"#</td>
+      <td class="mdl-data-table__cell--non-numeric">#idx "%Y-%m-%d %H:%M %Z"#</td>
       <td>#temp_out_max "%.1f ℃"#</td>
       <td>#temp_out_ave "%.1f ℃"#</td>
       <td>#temp_out_min "%.1f ℃"#</td>
-      <td>#wind_dir "%s" "-" "winddir_text(x)"#</td>
+      <td class="mdl-data-table__cell--non-numeric">#wind_dir "%s" "-" "winddir_text(x)"#</td>
       <td>#wind_ave "%.0f ㎞/h" "" "wind_kmph(x)"#</td>
       <td>#wind_gust "%.0f ㎞/h" "" "wind_kmph(x)"#</td>
       <td>#rain "%0.1f ㎜"#</td>