diff --git a/dist/index.html b/dist/index.html
index ff9c723..313448b 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -329,20 +329,20 @@
                             <div class="form-group">
                                 <!-- Email address input-->
                                 <input class="form-control" id="email" type="email" placeholder="Your Email *" data-sb-validations="required,email" />
-                                <div class="invalid-feedback d-none" data-sb-feedback="email:required">An email is required.</div>
-                                <div class="invalid-feedback d-none" data-sb-feedback="email:email">Email is not valid.</div>
+                                <div class="invalid-feedback" data-sb-feedback="email:required">An email is required.</div>
+                                <div class="invalid-feedback" data-sb-feedback="email:email">Email is not valid.</div>
                             </div>
                             <div class="form-group mb-md-0">
                                 <!-- Phone number input-->
                                 <input class="form-control" id="phone" type="tel" placeholder="Your Phone *" data-sb-validations="required" />
-                                <div class="invalid-feedback d-none" data-sb-feedback="phone:required">A phone number is required.</div>
+                                <div class="invalid-feedback" data-sb-feedback="phone:required">A phone number is required.</div>
                             </div>
                         </div>
                         <div class="col-md-6">
                             <div class="form-group form-group-textarea mb-md-0">
                                 <!-- Message input-->
                                 <textarea class="form-control" id="message" placeholder="Your Message *" data-sb-validations="required"></textarea>
-                                <div class="invalid-feedback d-none" data-sb-feedback="message:required">A message is required.</div>
+                                <div class="invalid-feedback" data-sb-feedback="message:required">A message is required.</div>
                             </div>
                         </div>
                     </div>
diff --git a/src/pug/index.pug b/src/pug/index.pug
index 1b66c08..e22f0a8 100644
--- a/src/pug/index.pug
+++ b/src/pug/index.pug
@@ -309,9 +309,9 @@ html(lang='en')
                                     placeholder='Your Email *',
                                     data-sb-validations='required,email'
                                 )
-                                .invalid-feedback.d-none(data-sb-feedback='email:required')
+                                .invalid-feedback(data-sb-feedback='email:required')
                                     | An email is required.
-                                .invalid-feedback.d-none(data-sb-feedback='email:email')
+                                .invalid-feedback(data-sb-feedback='email:email')
                                     | Email is not valid.
 
                             .form-group.mb-md-0
@@ -322,7 +322,7 @@ html(lang='en')
                                     placeholder='Your Phone *',
                                     data-sb-validations='required'
                                 )
-                                .invalid-feedback.d-none(data-sb-feedback='phone:required')
+                                .invalid-feedback(data-sb-feedback='phone:required')
                                     | A phone number is required.
 
                         .col-md-6
@@ -333,7 +333,7 @@ html(lang='en')
                                     placeholder='Your Message *',
                                     data-sb-validations='required'
                                 )
-                                .invalid-feedback.d-none(data-sb-feedback='message:required')
+                                .invalid-feedback(data-sb-feedback='message:required')
                                     | A message is required.
 
                     // Submit success message