diff --git a/config/nimdoc.cfg b/config/nimdoc.cfg
index e4b485ca0..585b3cc49 100644
--- a/config/nimdoc.cfg
+++ b/config/nimdoc.cfg
@@ -268,10 +268,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">$title</h1>
diff --git a/nimdoc/rst2html/expected/rst_examples.html b/nimdoc/rst2html/expected/rst_examples.html
index 8a08e8df5..0b9207688 100644
--- a/nimdoc/rst2html/expected/rst_examples.html
+++ b/nimdoc/rst2html/expected/rst_examples.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">Not a Nim Manual</h1>
diff --git a/nimdoc/test_out_index_dot_html/expected/index.html b/nimdoc/test_out_index_dot_html/expected/index.html
index 65241d356..35a5dfb56 100644
--- a/nimdoc/test_out_index_dot_html/expected/index.html
+++ b/nimdoc/test_out_index_dot_html/expected/index.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">foo</h1>
diff --git a/nimdoc/test_out_index_dot_html/expected/theindex.html b/nimdoc/test_out_index_dot_html/expected/theindex.html
index b2863f99a..aa9ca2645 100644
--- a/nimdoc/test_out_index_dot_html/expected/theindex.html
+++ b/nimdoc/test_out_index_dot_html/expected/theindex.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">Index</h1>
diff --git a/nimdoc/testproject/expected/subdir/subdir_b/utils.html b/nimdoc/testproject/expected/subdir/subdir_b/utils.html
index 40de645e3..27cef017b 100644
--- a/nimdoc/testproject/expected/subdir/subdir_b/utils.html
+++ b/nimdoc/testproject/expected/subdir/subdir_b/utils.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">subdir/subdir_b/utils</h1>
diff --git a/nimdoc/testproject/expected/testproject.html b/nimdoc/testproject/expected/testproject.html
index ee09b46af..a32e1180c 100644
--- a/nimdoc/testproject/expected/testproject.html
+++ b/nimdoc/testproject/expected/testproject.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">testproject</h1>
diff --git a/nimdoc/testproject/expected/theindex.html b/nimdoc/testproject/expected/theindex.html
index 03d9c72fe..978560e0f 100644
--- a/nimdoc/testproject/expected/theindex.html
+++ b/nimdoc/testproject/expected/theindex.html
@@ -56,10 +56,12 @@ function main() {
     }
   }
 }
+
+window.addEventListener('DOMContentLoaded', main);
 </script>
 
 </head>
-<body onload="main()">
+<body>
 <div class="document" id="documentId">
   <div class="container">
     <h1 class="title">Index</h1>