diff --git a/plugins/dev-tools/src/screenshot.js b/plugins/dev-tools/src/screenshot.js
index f968067713..fb29fc2b24 100644
--- a/plugins/dev-tools/src/screenshot.js
+++ b/plugins/dev-tools/src/screenshot.js
@@ -99,7 +99,7 @@ function workspaceToSvg_(workspace, callback, customCss) {
     })
     .join('\n');
   const style = document.createElement('style');
-  style.innerHTML = css + '\n' + customCss;
+  style.textContent = css + '\n' + customCss;
   svg.insertBefore(style, svg.firstChild);
 
   let svgAsXML = new XMLSerializer().serializeToString(svg);