diff --git a/js/package-lock.json b/js/package-lock.json
index 19d14da..bb9d33b 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "jupyter-golden-layout",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -635,15 +635,6 @@
           "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
           "dev": true
         },
-        "ssri": {
-          "version": "8.0.0",
-          "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.0.tgz",
-          "integrity": "sha512-aq/pz989nxVYwn16Tsbj1TqFpD5LLrQxHf5zaHuieFV+R0Bbr4y8qUsOA45hXT/N4/9UNXTarBjnjVmjSOVaAA==",
-          "dev": true,
-          "requires": {
-            "minipass": "^3.1.1"
-          }
-        },
         "style-loader": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/style-loader/-/style-loader-2.0.0.tgz",
@@ -2079,6 +2070,17 @@
         "ssri": "^6.0.1",
         "unique-filename": "^1.1.1",
         "y18n": "^4.0.0"
+      },
+      "dependencies": {
+        "ssri": {
+          "version": "6.0.2",
+          "resolved": "https://registry.npmjs.org/ssri/-/ssri-6.0.2.tgz",
+          "integrity": "sha512-cepbSq/neFK7xB6A50KHN0xHDotYzq58wWCa5LeWqnPrHG8GzfEjO/4O8kpmcGW+oaxkvhEJCWgbgNk4/ZV93Q==",
+          "dev": true,
+          "requires": {
+            "figgy-pudding": "^3.5.1"
+          }
+        }
       }
     },
     "cache-base": {
@@ -6500,12 +6502,12 @@
       }
     },
     "ssri": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/ssri/-/ssri-6.0.1.tgz",
-      "integrity": "sha512-3Wge10hNcT1Kur4PDFwEieXSCMCJs/7WvSACcrMYrNp+b8kDL1/0wJch5Ni2WrtwEa2IO8OsVfeKIciKCDx/QA==",
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
+      "integrity": "sha512-97qShzy1AiyxvPNIkLWoGua7xoQzzPjQ0HAH4B0rWKo7SZ6USuPcrUiAFrws0UH8RrbWmgq3LMTObhPIHbbBeQ==",
       "dev": true,
       "requires": {
-        "figgy-pudding": "^3.5.1"
+        "minipass": "^3.1.1"
       }
     },
     "static-extend": {