diff --git a/fsfe.org/cgi-bin/perdiem.php b/fsfe.org/cgi-bin/perdiem.php
index 9d6032220f..a889983153 100755
--- a/fsfe.org/cgi-bin/perdiem.php
+++ b/fsfe.org/cgi-bin/perdiem.php
@@ -31,7 +31,7 @@ $who = isset($_POST["who"]) ? $_POST["who"] : false;
 $activity = isset($_POST["activity"]) ? $_POST["activity"] : false;
 $activity_tag = explode(":", $activity)[0];
 $activity_text = explode(":", $activity)[1];
-$category_id = "6664";
+$category_id = "66640";
 $category_text = "Per diem";
 $description = isset($_POST["description"]) ? $_POST["description"] : false;
 $extra = isset($_POST["extra"]) ? $_POST["extra"] : false;
diff --git a/fsfe.org/internal/rc.en.xhtml b/fsfe.org/internal/rc.en.xhtml
index bd32b631e3..86882c972b 100644
--- a/fsfe.org/internal/rc.en.xhtml
+++ b/fsfe.org/internal/rc.en.xhtml
@@ -149,12 +149,12 @@
             <module id="fsfe-activities-options" />
           </select></td>
           <td><select class="form-control col-sm-3" name="category[]" id="category" size="1">
-            <option value="????:Other / I don't know">Other / I don't know</option>
-            <option value="6815:Office material">Office material</option>
-            <option value="6710:Packaging material">Packaging material</option>
-            <option value="6800:Postage">Postage</option>
-            <option value="6660:Travel costs - hotel">Travel costs - hotel</option>
-            <option value="6663:Travel costs - transport">Travel costs - transport</option>
+            <option value="???:Other / I don't know">Other / I don't know</option>
+            <option value="68150:Office material">Office material</option>
+            <option value="67100:Packaging material">Packaging material</option>
+            <option value="68000:Postage">Postage</option>
+            <option value="66600:Travel costs - hotel">Travel costs - hotel</option>
+            <option value="66630:Travel costs - transport">Travel costs - transport</option>
           </select></td>
           <td><input type="text" name="description[]" class="form-control" required="required" /></td>
           <td><input type="file" name="receipt[]" class="form-control" required="required" /></td>