diff --git a/src/web/html/index.html b/src/web/html/index.html
index 7fcb7415..011742d3 100755
--- a/src/web/html/index.html
+++ b/src/web/html/index.html
@@ -382,7 +382,7 @@
             </div>
         </div>
 
-        <div class="modal" id="save-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="save-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -442,7 +442,7 @@
             </div>
         </div>
 
-        <div class="modal" id="load-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="load-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -469,7 +469,7 @@
             </div>
         </div>
 
-        <div class="modal" id="options-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="options-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -582,7 +582,7 @@
             </div>
         </div>
 
-        <div class="modal" id="favourites-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="favourites-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -608,7 +608,7 @@
             </div>
         </div>
 
-        <div class="modal" id="support-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="support-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -744,7 +744,7 @@
             </div>
         </div>
 
-        <div class="modal" id="confirm-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="confirm-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -763,7 +763,7 @@
             </div>
         </div>
 
-        <div class="modal" id="input-tab-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="input-tab-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -822,7 +822,7 @@
             </div>
         </div>
 
-        <div class="modal" id="output-tab-modal" tabindex="-1" role="dialog">
+        <div class="modal fade" id="output-tab-modal" tabindex="-1" role="dialog">
             <div class="modal-dialog modal-lg" role="document">
                 <div class="modal-content">
                     <div class="modal-header">