diff --git a/packages/hierarchical-tags/package-lock.json b/packages/hierarchical-tags/package-lock.json
index 55ec9fc..f1426a5 100644
--- a/packages/hierarchical-tags/package-lock.json
+++ b/packages/hierarchical-tags/package-lock.json
@@ -11,7 +11,7 @@
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         "@braintree/sanitize-url": "^5.0.0",
         "css.escape": "^1.5.1",
-        "immutable": "^3.x.x",
+        "immutable": "^4.3.7",
         "prop-types": "^15.7.2",
         "react": "=15.7.0",
         "react-immutable-proptypes": "^2.2.0"
@@ -3307,9 +3307,9 @@
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     },
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-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
-      "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+      "version": "6.5.7",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
+      "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
       "dev": true,
       "dependencies": {
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@@ -4277,12 +4277,9 @@
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     "node_modules/immutable": {
-      "version": "3.8.2",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-3.8.2.tgz",
-      "integrity": "sha512-15gZoQ38eYjEjxkorfbcgBKBL6R7T459OuK+CpcWt7O3KF4uPCx2tD0uFETlUDIyo+1789crbMhTvQBSR5yBMg==",
-      "engines": {
-        "node": ">=0.10.0"
-      }
+      "version": "4.3.7",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.3.7.tgz",
+      "integrity": "sha512-1hqclzwYwjRDFLjcFxOM5AYkkG0rpFPpr1RLPMEuGczoS7YA8gLhy8SWXYRAA/XwfEHpfo3cw5JGioS32fnMRw=="
     },
     "node_modules/import-local": {
       "version": "2.0.0",
@@ -10176,9 +10173,9 @@
       "dev": true
     },
     "elliptic": {
-      "version": "6.5.4",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
-      "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+      "version": "6.5.7",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
+      "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
       "dev": true,
       "requires": {
         "bn.js": "^4.11.9",
@@ -10945,9 +10942,9 @@
       "dev": true
     },
     "immutable": {
-      "version": "3.8.2",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-3.8.2.tgz",
-      "integrity": "sha512-15gZoQ38eYjEjxkorfbcgBKBL6R7T459OuK+CpcWt7O3KF4uPCx2tD0uFETlUDIyo+1789crbMhTvQBSR5yBMg=="
+      "version": "4.3.7",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-4.3.7.tgz",
+      "integrity": "sha512-1hqclzwYwjRDFLjcFxOM5AYkkG0rpFPpr1RLPMEuGczoS7YA8gLhy8SWXYRAA/XwfEHpfo3cw5JGioS32fnMRw=="
     },
     "import-local": {
       "version": "2.0.0",