diff --git a/external/survey-2018/graph.html b/external/survey-2018/graph.html
index 8c431d22320e3..f77b24aa67f53 100644
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@@ -1,5 +1,5 @@
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   <title>Web Survey Report 2018: Technologies | Node.js</title>
diff --git a/external/survey-2018/index.html b/external/survey-2018/index.html
index 38ed4fbfaf224..34a8671978639 100644
--- a/external/survey-2018/index.html
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@@ -1,5 +1,5 @@
 <!DOCTYPE html>
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+<html lang="en">
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   <meta charset="utf-8">
   <title>Web Survey Report 2018 | Node.js</title>
