diff --git a/config/configuration.sample.yml b/config/configuration.sample.yml
index ff17d20561..31a88af284 100644
--- a/config/configuration.sample.yml
+++ b/config/configuration.sample.yml
@@ -127,6 +127,9 @@ registration-fields:
     -
         name: company
         required: true
+    -
+        name: lastname
+        required: true
     -
         name: firstname
         required: true
diff --git a/lib/conf.d/configuration.yml b/lib/conf.d/configuration.yml
index dc53d2aa34..3392f71923 100644
--- a/lib/conf.d/configuration.yml
+++ b/lib/conf.d/configuration.yml
@@ -130,6 +130,9 @@ registration-fields:
     -
         name: company
         required: true
+    -
+        name: lastname
+        required: true
     -
         name: firstname
         required: true