diff --git a/Source/assets/html/add.twig b/Source/assets/html/add.twig
index 950dd6b..a7769d5 100644
--- a/Source/assets/html/add.twig
+++ b/Source/assets/html/add.twig
@@ -28,10 +28,10 @@
             <label class="control-label col-sm-6" for="lang">Name of external library, if needed:</label>
             <label class="control-label col-sm-6" for="lang">It needs a specific version of this library?:</label>
             <div class="col-sm-6">
-                <input type="text" name="extlib" placeholder="Name of library"/>
+                <input type="text" name="extlib" id="extlib" placeholder="Name of library"/>
             </div>
             <div class="col-sm-6">
-                <input type="text" name="extlibver" placeholder="Version used, only if needed"/>
+                <input type="text" name="extlibver" id="extlibver" placeholder="Version used, only if needed"/>
             </div>
         </div>
         <div class="form-group">
@@ -73,4 +73,25 @@
             width: 100%;
         }
     </style>
+{% endblock %}
+
+{% block js %}
+    <script>
+        function verRequired() {
+            if(extlib.value=="")
+                extlibver.removeAttribute("required");
+            else
+                extlibver.setAttribute("required","required");
+            if(extlib2.value=="")
+                extlibver2.removeAttribute("required");
+            else
+                extlibver2.setAttribute("required","required");
+        }
+        extlib = document.getElementById("extlib");
+        extlibver=document.getElementById("extlibver");
+        extlib2 = document.getElementById("extlib2");
+        extlibver2=document.getElementById("extlibver2");
+        extlib.onkeyup=verRequired;
+        extlib2.onkeyup=verRequired;
+    </script>
 {% endblock %}
\ No newline at end of file