diff --git a/templates/custom.html b/templates/custom.html
index 11d0d95..e650f12 100644
--- a/templates/custom.html
+++ b/templates/custom.html
@@ -28,7 +28,7 @@
                     {% with target_width=3, target_height=8.5 %}
                         {% include 'popper_svg.html' %}
                     {% endwith %}
-                    <input type="radio" id="popper" name="target_type" value="popper" required class="m1-"> <!-- Margin added for spacing -->
+                    <input type="radio" id="popper" name="target_type" value="popper" required class="m-1"> <!-- Margin added for spacing -->
                 </label>
             </div>
             <div class="flex flex-col justify-between h-full">