diff --git a/integration/firestore/package.json b/integration/firestore/package.json
index 577d948596b..57c71059313 100644
--- a/integration/firestore/package.json
+++ b/integration/firestore/package.json
@@ -28,7 +28,7 @@
     "mocha": "7.2.0",
     "ts-loader": "8.0.11",
     "typescript": "4.0.5",
-    "webpack": "4.44.2",
+    "webpack": "5.5.1",
     "webpack-stream": "6.1.1"
   }
 }
diff --git a/package.json b/package.json
index f4253bc80b9..8e718041499 100644
--- a/package.json
+++ b/package.json
@@ -153,7 +153,7 @@
     "typedoc": "0.16.11",
     "typescript": "4.0.5",
     "watch": "1.0.2",
-    "webpack": "4.44.2",
+    "webpack": "5.5.1",
     "yargs": "16.1.1"
   },
   "husky": {
diff --git a/repo-scripts/size-analysis/package.json b/repo-scripts/size-analysis/package.json
index 9ff1a843ed2..5e7db27f4eb 100644
--- a/repo-scripts/size-analysis/package.json
+++ b/repo-scripts/size-analysis/package.json
@@ -23,7 +23,7 @@
     "rollup-plugin-replace": "2.2.0",
     "rollup-plugin-typescript2": "0.29.0",
     "@rollup/plugin-virtual": "2.0.3",
-    "webpack": "4.44.2",
+    "webpack": "5.5.1",
     "@types/webpack": "4.41.25",
     "webpack-virtual-modules": "0.3.2",
     "child-process-promise": "2.2.1",
diff --git a/yarn.lock b/yarn.lock
index a9574ccae6d..2ac89d87518 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2704,7 +2704,23 @@
   dependencies:
     "@types/node" "*"
 
-"@types/estree@*":
+"@types/eslint-scope@^3.7.0":
+  version "3.7.0"
+  resolved "https://registry.npmjs.org/@types/eslint-scope/-/eslint-scope-3.7.0.tgz#4792816e31119ebd506902a482caec4951fabd86"
+  integrity sha512-O/ql2+rrCUe2W2rs7wMR+GqPRcgB6UiqN5RhrR5xruFlY7l9YLMn0ZkDzjoHLeiFkR8MCQZVudUuuvQ2BLC9Qw==
+  dependencies:
+    "@types/eslint" "*"
+    "@types/estree" "*"
+
+"@types/eslint@*":
+  version "7.2.5"
+  resolved "https://registry.npmjs.org/@types/eslint/-/eslint-7.2.5.tgz#92172ecf490c2fce4b076739693d75f30376d610"
+  integrity sha512-Dc6ar9x16BdaR3NSxSF7T4IjL9gxxViJq8RmFd+2UAyA+K6ck2W+gUwfgpG/y9TPyUuBL35109bbULpEynvltA==
+  dependencies:
+    "@types/estree" "*"
+    "@types/json-schema" "*"
+
+"@types/estree@*", "@types/estree@^0.0.45":
   version "0.0.45"
   resolved "https://registry.npmjs.org/@types/estree/-/estree-0.0.45.tgz#e9387572998e5ecdac221950dab3e8c3b16af884"
   integrity sha512-jnqIUKDUqJbDIUxm0Uj7bnlMnRm1T/eZ9N+AVMqhPgzrba2GhGG5o/jCTwmdPK709nEZsGoMzXEDUjcXHa3W0g==
@@ -2755,7 +2771,7 @@
     "@types/through" "*"
     rxjs "^6.4.0"
 
-"@types/json-schema@^7.0.3", "@types/json-schema@^7.0.5", "@types/json-schema@^7.0.6":
+"@types/json-schema@*", "@types/json-schema@^7.0.3", "@types/json-schema@^7.0.5", "@types/json-schema@^7.0.6":
   version "7.0.6"
   resolved "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz#f4c7ec43e81b319a9815115031709f26987891f0"
   integrity sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==
@@ -3314,6 +3330,11 @@ acorn@^8.0.1:
   resolved "https://registry.npmjs.org/acorn/-/acorn-8.0.2.tgz#f7503a253311d4af42332bc188d5713edb2e030a"
   integrity sha512-t0Dw7AOyeKs4nez4dhzkBDHB28ICo1pxk3UFsLfsCHOkLW+CwbAZJPMa0vBbq0Mqsslhb7n/7H4qB5txaVQ4ew==
 
+acorn@^8.0.4:
+  version "8.0.4"
+  resolved "https://registry.npmjs.org/acorn/-/acorn-8.0.4.tgz#7a3ae4191466a6984eee0fe3407a4f3aa9db8354"
+  integrity sha512-XNP0PqF1XD19ZlLKvB7cMmnZswW4C/03pRHgirB30uSJTaS3A3V1/P4sS3HPvFmjoriPCJQs+JDSbm4bL1TxGQ==
+
 adm-zip@0.4.16, adm-zip@^0.4.9, adm-zip@~0.4.3:
   version "0.4.16"
   resolved "https://registry.npmjs.org/adm-zip/-/adm-zip-0.4.16.tgz#cf4c508fdffab02c269cbc7f471a875f05570365"
@@ -6418,6 +6439,14 @@ enhanced-resolve@^4.0.0, enhanced-resolve@^4.3.0:
     memory-fs "^0.5.0"
     tapable "^1.0.0"
 
+enhanced-resolve@^5.3.1:
+  version "5.3.1"
+  resolved "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.3.1.tgz#3f988d0d7775bdc2d96ede321dc81f8249492f57"
+  integrity sha512-G1XD3MRGrGfNcf6Hg0LVZG7GIKcYkbfHa5QMxt1HDUTdYoXH0JR1xXyg+MaKLF73E9A27uWNVxvFivNRYeUB6w==
+  dependencies:
+    graceful-fs "^4.2.4"
+    tapable "^2.0.0"
+
 enquirer@^2.3.0, enquirer@^2.3.5:
   version "2.3.6"
   resolved "https://registry.npmjs.org/enquirer/-/enquirer-2.3.6.tgz#2a7fe5dd634a1e4125a975ec994ff5456dc3734d"
@@ -7947,6 +7976,11 @@ glob-to-regexp@^0.3.0:
   resolved "https://registry.npmjs.org/glob-to-regexp/-/glob-to-regexp-0.3.0.tgz#8c5a1494d2066c570cc3bfe4496175acc4d502ab"
   integrity sha1-jFoUlNIGbFcMw7/kSWF1rMTVAqs=
 
+glob-to-regexp@^0.4.1:
+  version "0.4.1"
+  resolved "https://registry.npmjs.org/glob-to-regexp/-/glob-to-regexp-0.4.1.tgz#c75297087c851b9a578bd217dd59a92f59fe546e"
+  integrity sha512-lkX1HJXwyMcprw/5YUZc2s7DrpAiHB21/V+E1rHUrVNokkvB6bqMzT0VfV6/86ZNabt1k14YOIaT7nDvOX3Iiw==
+
 glob-watcher@^5.0.3:
   version "5.0.5"
   resolved "https://registry.npmjs.org/glob-watcher/-/glob-watcher-5.0.5.tgz#aa6bce648332924d9a8489be41e3e5c52d4186dc"
@@ -9766,6 +9800,15 @@ jest-worker@^26.2.1:
     merge-stream "^2.0.0"
     supports-color "^7.0.0"
 
+jest-worker@^26.6.1:
+  version "26.6.2"
+  resolved "https://registry.npmjs.org/jest-worker/-/jest-worker-26.6.2.tgz#7f72cbc4d643c365e27b9fd775f9d0eaa9c7a8ed"
+  integrity sha512-KWYVV1c4i+jbMpaBC+U++4Va0cp8OisU185o73T1vo99hqi7w8tSJfUXYswwqqrjzwxa6KpRK54WhPvwf5w6PQ==
+  dependencies:
+    "@types/node" "*"
+    merge-stream "^2.0.0"
+    supports-color "^7.0.0"
+
 jju@^1.1.0, jju@~1.4.0:
   version "1.4.0"
   resolved "https://registry.npmjs.org/jju/-/jju-1.4.0.tgz#a3abe2718af241a2b2904f84a625970f389ae32a"
@@ -10468,6 +10511,11 @@ loader-runner@^2.4.0:
   resolved "https://registry.npmjs.org/loader-runner/-/loader-runner-2.4.0.tgz#ed47066bfe534d7e84c4c7b9998c2a75607d9357"
   integrity sha512-Jsmr89RcXGIwivFY21FcRrisYZfvLMTWx5kOLc+JTxtpBOG6xML0vzbc6SEQG2FO9/4Fc3wW4LVcB5DmGflaRw==
 
+loader-runner@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.npmjs.org/loader-runner/-/loader-runner-4.1.0.tgz#f70bc0c29edbabdf2043e7ee73ccc3fe1c96b42d"
+  integrity sha512-oR4lB4WvwFoC70ocraKhn5nkKSs23t57h9udUgw8o0iH8hMXeEoRuUgfcvgUwAJ1ZpRqBvcou4N2SMvM1DwMrA==
+
 loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2.3, loader-utils@^1.4.0:
   version "1.4.0"
   resolved "https://registry.npmjs.org/loader-utils/-/loader-utils-1.4.0.tgz#c579b5e34cb34b1a74edc6c1fb36bfa371d5a613"
@@ -11187,7 +11235,7 @@ mime-db@1.44.0:
   resolved "https://registry.npmjs.org/mime-db/-/mime-db-1.45.0.tgz#cceeda21ccd7c3a745eba2decd55d4b73e7879ea"
   integrity sha512-CkqLUxUk15hofLoLyljJSrukZi8mAtgd+yE5uO4tqRZsdsAJKv0O+rFMhVDRJgozy+yG6md5KwuXhD4ocIoP+w==
 
-mime-types@^2.0.8, mime-types@^2.1.12, mime-types@^2.1.16, mime-types@~2.1.19, mime-types@~2.1.24:
+mime-types@^2.0.8, mime-types@^2.1.12, mime-types@^2.1.16, mime-types@^2.1.27, mime-types@~2.1.19, mime-types@~2.1.24:
   version "2.1.27"
   resolved "https://registry.npmjs.org/mime-types/-/mime-types-2.1.27.tgz#47949f98e279ea53119f5722e0f34e529bec009f"
   integrity sha512-JIhqnCasI9yD+SsmkquHBxTSEuZdQX5BuQnS2Vc7puQQQ+8yiP5AY5uWhpdv4YL4VM5c6iliiYWPgJ/nJQLp7w==
@@ -11520,7 +11568,7 @@ negotiator@0.6.2:
   resolved "https://registry.npmjs.org/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"
   integrity sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw==
 
-neo-async@^2.5.0, neo-async@^2.6.0, neo-async@^2.6.1:
+neo-async@^2.5.0, neo-async@^2.6.0, neo-async@^2.6.1, neo-async@^2.6.2:
   version "2.6.2"
   resolved "https://registry.npmjs.org/neo-async/-/neo-async-2.6.2.tgz#b4aafb93e3aeb2d8174ca53cf163ab7d7308305f"
   integrity sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==
@@ -13975,6 +14023,13 @@ serialize-javascript@^4.0.0:
   dependencies:
     randombytes "^2.1.0"
 
+serialize-javascript@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-5.0.1.tgz#7886ec848049a462467a97d3d918ebb2aaf934f4"
+  integrity sha512-SaaNal9imEO737H2c05Og0/8LUXG7EnsZyMa8MzkmuHoELfT6txuj0cMqRj6zfPKnmQ1yasR4PCJc8x+M4JSPA==
+  dependencies:
+    randombytes "^2.1.0"
+
 serve-static@1.14.1:
   version "1.14.1"
   resolved "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz#666e636dc4f010f7ef29970a88a674320898b2f9"
@@ -14270,7 +14325,7 @@ sort-keys@^2.0.0:
   dependencies:
     is-plain-obj "^1.0.0"
 
-source-list-map@^2.0.0:
+source-list-map@^2.0.0, source-list-map@^2.0.1:
   version "2.0.1"
   resolved "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.1.tgz#3993bd873bfc48479cca9ea3a547835c7c154b34"
   integrity sha512-qnQ7gVMxGNxsiL4lEuJwe/To8UnK7fAnmbGEEH8RpLouuKbeEm0lhbQVFIrNSuB+G7tVrAlVsZgETT5nljf+Iw==
@@ -14885,6 +14940,11 @@ tapable@^1.0.0, tapable@^1.1.3:
   resolved "https://registry.npmjs.org/tapable/-/tapable-1.1.3.tgz#a1fccc06b58db61fd7a45da2da44f5f3a3e67ba2"
   integrity sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA==
 
+tapable@^2.0.0:
+  version "2.1.1"
+  resolved "https://registry.npmjs.org/tapable/-/tapable-2.1.1.tgz#b01cc1902d42a7bb30514e320ce21c456f72fd3f"
+  integrity sha512-Wib1S8m2wdpLbmQz0RBEVosIyvb/ykfKXf3ZIDqvWoMg/zTNm6G/tDSuUM61J1kNCDXWJrLHGSFeMhAG+gAGpQ==
+
 tar-stream@^2.1.0:
   version "2.1.4"
   resolved "https://registry.npmjs.org/tar-stream/-/tar-stream-2.1.4.tgz#c4fb1a11eb0da29b893a5b25476397ba2d053bfa"
@@ -14996,7 +15056,19 @@ terser-webpack-plugin@^1.4.3:
     webpack-sources "^1.4.0"
     worker-farm "^1.7.0"
 
-terser@5.4.0:
+terser-webpack-plugin@^5.0.3:
+  version "5.0.3"
+  resolved "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-5.0.3.tgz#ec60542db2421f45735c719d2e17dabfbb2e3e42"
+  integrity sha512-zFdGk8Lh9ZJGPxxPE6jwysOlATWB8GMW8HcfGULWA/nPal+3VdATflQvSBSLQJRCmYZnfFJl6vkRTiwJGNgPiQ==
+  dependencies:
+    jest-worker "^26.6.1"
+    p-limit "^3.0.2"
+    schema-utils "^3.0.0"
+    serialize-javascript "^5.0.1"
+    source-map "^0.6.1"
+    terser "^5.3.8"
+
+terser@5.4.0, terser@^5.3.8:
   version "5.4.0"
   resolved "https://registry.npmjs.org/terser/-/terser-5.4.0.tgz#9815c0839072d5c894e22c6fc508fbe9f5e7d7e8"
   integrity sha512-3dZunFLbCJis9TAF2VnX+VrQLctRUmt1p3W2kCsJuZE4ZgWqh//+1MZ62EanewrqKoUf4zIaDGZAvml4UDc0OQ==
@@ -16031,6 +16103,14 @@ watchpack@^1.7.4:
     chokidar "^3.4.1"
     watchpack-chokidar2 "^2.0.0"
 
+watchpack@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.npmjs.org/watchpack/-/watchpack-2.0.1.tgz#2f2192c542c82a3bcde76acd3411470c120426a8"
+  integrity sha512-vO8AKGX22ZRo6PiOFM9dC0re8IcKh8Kd/aH2zeqUc6w4/jBGlTy2P7fTC6ekT0NjVeGjgU2dGC5rNstKkeLEQg==
+  dependencies:
+    glob-to-regexp "^0.4.1"
+    graceful-fs "^4.1.2"
+
 wcwidth@^1.0.0, wcwidth@^1.0.1:
   version "1.0.1"
   resolved "https://registry.npmjs.org/wcwidth/-/wcwidth-1.0.1.tgz#f0b0dcf915bc5ff1528afadb2c0e17b532da2fe8"
@@ -16113,6 +16193,14 @@ webpack-sources@^1.4.0, webpack-sources@^1.4.1:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
+webpack-sources@^2.1.1:
+  version "2.2.0"
+  resolved "https://registry.npmjs.org/webpack-sources/-/webpack-sources-2.2.0.tgz#058926f39e3d443193b6c31547229806ffd02bac"
+  integrity sha512-bQsA24JLwcnWGArOKUxYKhX3Mz/nK1Xf6hxullKERyktjNMC4x8koOeaDNTA2fEJ09BdWLbM/iTW0ithREUP0w==
+  dependencies:
+    source-list-map "^2.0.1"
+    source-map "^0.6.1"
+
 webpack-stream@6.1.1:
   version "6.1.1"
   resolved "https://registry.npmjs.org/webpack-stream/-/webpack-stream-6.1.1.tgz#8db6b1efdbebf796b1e30ac1256645f4a3cf5867"
@@ -16135,7 +16223,37 @@ webpack-virtual-modules@0.3.2:
   dependencies:
     debug "^3.0.0"
 
-webpack@4.44.2, webpack@^4.26.1:
+webpack@5.5.1:
+  version "5.5.1"
+  resolved "https://registry.npmjs.org/webpack/-/webpack-5.5.1.tgz#d6537f85554a0e59f15e6e683af11befdd0476aa"
+  integrity sha512-v4RzZP9BG2xxMLhxcFIo89M+nyIqGjh35Bhm5EE+I2N8y3dc9jT5OSb1HewUMkzMPyyDscOkVD6pSn6EMtTwNQ==
+  dependencies:
+    "@types/eslint-scope" "^3.7.0"
+    "@types/estree" "^0.0.45"
+    "@webassemblyjs/ast" "1.9.0"
+    "@webassemblyjs/helper-module-context" "1.9.0"
+    "@webassemblyjs/wasm-edit" "1.9.0"
+    "@webassemblyjs/wasm-parser" "1.9.0"
+    acorn "^8.0.4"
+    browserslist "^4.14.5"
+    chrome-trace-event "^1.0.2"
+    enhanced-resolve "^5.3.1"
+    eslint-scope "^5.1.1"
+    events "^3.2.0"
+    glob-to-regexp "^0.4.1"
+    graceful-fs "^4.2.4"
+    json-parse-better-errors "^1.0.2"
+    loader-runner "^4.1.0"
+    mime-types "^2.1.27"
+    neo-async "^2.6.2"
+    pkg-dir "^4.2.0"
+    schema-utils "^3.0.0"
+    tapable "^2.0.0"
+    terser-webpack-plugin "^5.0.3"
+    watchpack "^2.0.0"
+    webpack-sources "^2.1.1"
+
+webpack@^4.26.1:
   version "4.44.2"
   resolved "https://registry.npmjs.org/webpack/-/webpack-4.44.2.tgz#6bfe2b0af055c8b2d1e90ed2cd9363f841266b72"
   integrity sha512-6KJVGlCxYdISyurpQ0IPTklv+DULv05rs2hseIXer6D7KrUicRDLFb4IUM1S6LUAKypPM/nSiVSuv8jHu1m3/Q==