diff --git a/web/package-lock.json b/web/package-lock.json
index 6c0a9d3cd..2327b89e2 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -955,9 +955,9 @@
             "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
         },
         "construct-style-sheets-polyfill": {
-            "version": "2.4.9",
-            "resolved": "https://registry.npmjs.org/construct-style-sheets-polyfill/-/construct-style-sheets-polyfill-2.4.9.tgz",
-            "integrity": "sha512-kPXZXxsp7CTr/Vs29+omUA29wTrFplkdY6jqxyv0DDWC5Ro79WmwpboH2M9KiOclbtn8r81GCFtc7+t7OjRnCw=="
+            "version": "2.4.16",
+            "resolved": "https://registry.npmjs.org/construct-style-sheets-polyfill/-/construct-style-sheets-polyfill-2.4.16.tgz",
+            "integrity": "sha512-gaXX8c0IcLpTNj6q6TCKnhBJ1wuzmWEIrjp3pc1XfXS57WnvB3rVeAvsqYwyGOdPNdZiZYFyCOLgYbKKjhHIFg=="
         },
         "copy-descriptor": {
             "version": "0.1.1",
diff --git a/web/package.json b/web/package.json
index 81aeddfc6..883123bd4 100644
--- a/web/package.json
+++ b/web/package.json
@@ -18,7 +18,7 @@
         "@types/codemirror": "0.0.108",
         "chart.js": "^2.9.4",
         "codemirror": "^5.59.2",
-        "construct-style-sheets-polyfill": "^2.4.9",
+        "construct-style-sheets-polyfill": "^2.4.16",
         "flowchart.js": "^1.15.0",
         "lit-element": "^2.4.0",
         "lit-html": "^1.3.0",