diff --git a/package-lock.json b/package-lock.json
index 014237e..79d0e30 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4142,9 +4142,9 @@
       }
     },
     "core-js": {
-      "version": "3.6.5",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.5.tgz",
-      "integrity": "sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA=="
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.5.0.tgz",
+      "integrity": "sha512-Ifh3kj78gzQ7NAoJXeTu+XwzDld0QRIwjBLRqAMhuLhP3d2Av5wmgE9ycfnvK6NAEjTkQ1sDPeoEZAWO3Hx1Uw=="
     },
     "core-js-compat": {
       "version": "3.6.5",
diff --git a/package.json b/package.json
index e1f5339..66ba9c6 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "@traviswheelerlab/dfam-soda": "^1.2.3",
     "AlignmentSummaryViewer": "git+https://github.com/Dfam-consortium/AlignmentSummaryViewer.git#0.1.2",
     "Karyotype": "git+https://github.com/Dfam-consortium/Karyotype.git#0.1.0",
-    "core-js": "^3.6.5",
+    "core-js": "~3.5.0",
     "custom-event-polyfill": "^1.0.7",
     "d3": "^5.16.0",
     "file-saver": "^2.0.2",