diff --git a/package.json b/package.json
index 08627ebd4d0..8886c93d83e 100644
--- a/package.json
+++ b/package.json
@@ -143,7 +143,7 @@
     "sinon": "9.0.2",
     "sinon-chai": "3.5.0",
     "source-map-loader": "1.0.1",
-    "terser": "4.8.0",
+    "terser": "5.2.1",
     "ts-loader": "6.2.2",
     "ts-node": "8.10.2",
     "tslint": "6.1.3",
diff --git a/repo-scripts/size-analysis/package.json b/repo-scripts/size-analysis/package.json
index cd358144d42..c96930f2e50 100644
--- a/repo-scripts/size-analysis/package.json
+++ b/repo-scripts/size-analysis/package.json
@@ -26,7 +26,7 @@
     "rollup-plugin-typescript2": "0.27.1",
     "tmp": "0.2.1",
     "typescript": "3.9.7",
-    "terser": "4.8.0",
+    "terser": "5.2.1",
     "yargs": "15.4.1",
     "@firebase/util": "0.3.1"
   },
diff --git a/yarn.lock b/yarn.lock
index d0719245b88..49e3ad2f583 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1200,6 +1200,33 @@
     unique-filename "^1.1.1"
     which "^1.3.1"
 
+"@firebase/firestore@1.16.4":
+  version "1.16.4"
+  resolved "https://registry.npmjs.org/@firebase/firestore/-/firestore-1.16.4.tgz#29cb121f5686cab6e310bf16a1094f06f3678385"
+  integrity sha512-Ur+I8a8RkkbbJRsebkYAUwKFkbh9FemDxTFD/2Vp01pAPM8S3MoIcVegAfTvnPlG/ObBq5O7wI4CRA6b/G/Iyg==
+  dependencies:
+    "@firebase/component" "0.1.18"
+    "@firebase/firestore-types" "1.12.0"
+    "@firebase/logger" "0.2.6"
+    "@firebase/util" "0.3.1"
+    "@firebase/webchannel-wrapper" "0.3.0"
+    "@grpc/grpc-js" "^1.0.0"
+    "@grpc/proto-loader" "^0.5.0"
+    node-fetch "2.6.0"
+    tslib "^1.11.1"
+
+"@firebase/performance@0.3.11":
+  version "0.3.11"
+  resolved "https://registry.npmjs.org/@firebase/performance/-/performance-0.3.11.tgz#833c8abe5f5554f25545c8d28b487d8ac3ff3f95"
+  integrity sha512-L00vBUa2zzoSSOq3StTN43fPxtJ+myF+t+2kP5bQGHN5WOmf22lIsuEjAy1FAscDjVjhL1k5rKMY332ZwEfblg==
+  dependencies:
+    "@firebase/component" "0.1.18"
+    "@firebase/installations" "0.4.16"
+    "@firebase/logger" "0.2.6"
+    "@firebase/performance-types" "0.0.13"
+    "@firebase/util" "0.3.1"
+    tslib "^1.11.1"
+
 "@google-cloud/common@^3.0.0":
   version "3.3.2"
   resolved "https://registry.npmjs.org/@google-cloud/common/-/common-3.3.2.tgz#595ce85ebbcaa8b38519336bf6747e32e7706df7"
@@ -6860,6 +6887,26 @@ firebase-tools@8.6.0:
     winston "^3.0.0"
     ws "^7.2.3"
 
+firebase@7.18.0:
+  version "7.18.0"
+  resolved "https://registry.npmjs.org/firebase/-/firebase-7.18.0.tgz#00e3967f5bc608f3e12c1a5f0192f559de87943e"
+  integrity sha512-RGq0rWX25EDsM21TjRe1FbnygJwHXL7yN4P0Zh2Z7dWrBcfJ8tQpDxgwMDtiJTuo9UYExK3py4wjgpGJBau6wg==
+  dependencies:
+    "@firebase/analytics" "0.4.2"
+    "@firebase/app" "0.6.10"
+    "@firebase/app-types" "0.6.1"
+    "@firebase/auth" "0.14.9"
+    "@firebase/database" "0.6.11"
+    "@firebase/firestore" "1.16.4"
+    "@firebase/functions" "0.4.50"
+    "@firebase/installations" "0.4.16"
+    "@firebase/messaging" "0.7.0"
+    "@firebase/performance" "0.3.11"
+    "@firebase/polyfill" "0.3.36"
+    "@firebase/remote-config" "0.1.27"
+    "@firebase/storage" "0.3.42"
+    "@firebase/util" "0.3.1"
+
 flagged-respawn@^1.0.0:
   version "1.0.1"
   resolved "https://registry.npmjs.org/flagged-respawn/-/flagged-respawn-1.0.1.tgz#e7de6f1279ddd9ca9aac8a5971d618606b3aab41"
@@ -14274,7 +14321,16 @@ terser-webpack-plugin@^1.4.3:
     webpack-sources "^1.4.0"
     worker-farm "^1.7.0"
 
-terser@4.8.0, terser@^4.1.2, terser@^4.7.0:
+terser@5.2.1:
+  version "5.2.1"
+  resolved "https://registry.npmjs.org/terser/-/terser-5.2.1.tgz#40b971b8d28b4fe98c9e8c0d073ab48e7bb96cd8"
+  integrity sha512-/AOtjRtAMNGO0fIF6m8HfcvXTw/2AKpsOzDn36tA5RfhRdeXyb4RvHxJ5Pah7iL6dFkLk+gOnCaNHGwJPl6TrQ==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.12"
+
+terser@^4.1.2, terser@^4.7.0:
   version "4.8.0"
   resolved "https://registry.npmjs.org/terser/-/terser-4.8.0.tgz#63056343d7c70bb29f3af665865a46fe03a0df17"
   integrity sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==