diff --git a/examples/soap-calculator/public/index.html b/examples/soap-calculator/public/index.html
index 897347d65ba9..45adf643cdad 100644
--- a/examples/soap-calculator/public/index.html
+++ b/examples/soap-calculator/public/index.html
@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-soap-calculator</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">
diff --git a/examples/todo-list/public/index.html b/examples/todo-list/public/index.html
index 6866afbe8e15..6a58315c24e6 100644
--- a/examples/todo-list/public/index.html
+++ b/examples/todo-list/public/index.html
@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-todo-list</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">
diff --git a/examples/todo/public/index.html b/examples/todo/public/index.html
index fbd397991eb7..861687005696 100644
--- a/examples/todo/public/index.html
+++ b/examples/todo/public/index.html
@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-todo</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">
diff --git a/packages/cli/generators/app/templates/public/index.html.ejs b/packages/cli/generators/app/templates/public/index.html.ejs
index 88759a7be6ac..7f9ae8035648 100644
--- a/packages/cli/generators/app/templates/public/index.html.ejs
+++ b/packages/cli/generators/app/templates/public/index.html.ejs
@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -59,8 +59,8 @@
     <h1><%= project.name %></h1>
     <p>Version <%= project.version || '1.0.0' %></p>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">