diff --git a/package.json b/package.json
index aff08104f0..c22e086325 100644
--- a/package.json
+++ b/package.json
@@ -99,7 +99,7 @@
     "prettier": "^2.0.5",
     "puppeteer": "^5.2.0",
     "rewiremock": "^3.13.9",
-    "source-map": "^0.6.1",
+    "source-map": "https://github.com/benthemonkey/source-map.git#d95423f77edef6cbb9e21d2d6014c7de85ae220a",
     "stylelint": "^13.0.0",
     "stylelint-config-prettier": "^8.0.2",
     "stylelint-config-standard": "^20.0.0",
@@ -111,6 +111,9 @@
     "yarn-deduplicate": "^3.0.0",
     "zulip-js": "^2.0.8"
   },
+  "resolutions": {
+    "/source-map": "https://github.com/benthemonkey/source-map.git#d95423f77edef6cbb9e21d2d6014c7de85ae220a"
+  },
   "scripts": {
     "postinstall": "rm -rf ./var/webpack-cache",
     "lint": "eslint --quiet --cache",
diff --git a/version.py b/version.py
index 0619fcf69d..60a0ababf4 100644
--- a/version.py
+++ b/version.py
@@ -44,4 +44,4 @@ API_FEATURE_LEVEL = 34
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = '111.2'
+PROVISION_VERSION = '111.3'
diff --git a/yarn.lock b/yarn.lock
index 6fa684b165..ec8508e3be 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11002,10 +11002,9 @@ source-map@^0.5.0, source-map@^0.5.6:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
-source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
+source-map@^0.6.0, source-map@^0.6.1, "source-map@https://github.com/benthemonkey/source-map.git#d95423f77edef6cbb9e21d2d6014c7de85ae220a", source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
-  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
+  resolved "https://github.com/benthemonkey/source-map.git#d95423f77edef6cbb9e21d2d6014c7de85ae220a"
 
 source-map@^0.7.3:
   version "0.7.3"