diff --git a/package.json b/package.json
index c3c75b0ba..a8d37a82a 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "gfm.css": "^1.1.2",
     "jsrsasign": "^10.5.25",
     "katex": "^0.16.0",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "matrix-js-sdk": "21.0.0-rc.1",
     "matrix-react-sdk": "github:matrix-org/matrix-react-sdk#develop",
     "matrix-widget-api": "^1.1.1",
     "prop-types": "^15.7.2",
diff --git a/yarn.lock b/yarn.lock
index e76452645..2e27fc392 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3174,6 +3174,11 @@ brorand@^1.0.1, brorand@^1.1.0:
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha512-cKV8tMCEpQs4hK/ik71d6LrPOnpkpGBR0wzxqr68g2m/LB2GxVYQroAjMJZRVM1Y4BCjCKc3vAamxSzOY2RP+w==
 
+browser-request@^0.3.3:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/browser-request/-/browser-request-0.3.3.tgz#9ece5b5aca89a29932242e18bf933def9876cc17"
+  integrity sha512-YyNI4qJJ+piQG6MMEuo7J3Bzaqssufx04zpEKYfSrl/1Op59HWali9zMtBpXnkmqMcOuWJPZvudrm9wISmnCbg==
+
 browserify-aes@^1.0.0, browserify-aes@^1.0.4:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/browserify-aes/-/browserify-aes-1.2.0.tgz#326734642f403dabc3003209853bb70ad428ef48"
@@ -8307,6 +8312,21 @@ matrix-events-sdk@^0.0.1-beta.7:
   resolved "https://registry.yarnpkg.com/matrix-events-sdk/-/matrix-events-sdk-0.0.1-beta.7.tgz#5ffe45eba1f67cc8d7c2377736c728b322524934"
   integrity sha512-9jl4wtWanUFSy2sr2lCjErN/oC8KTAtaeaozJtrgot1JiQcEI4Rda9OLgQ7nLKaqb4Z/QUx/fR3XpDzm5Jy1JA==
 
+matrix-js-sdk@21.0.0-rc.1:
+  version "21.0.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-21.0.0-rc.1.tgz#254d7183cca845643a5da3f72de7193fafd9780c"
+  integrity sha512-jHJQLSb5egMMZPrDrjKY1mmsGdIaPPZNy+7MTikeb46tP3ES7Om9U6wsSouKFdW8khvg/nuxZfbEdM1lBMi15Q==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+    another-json "^0.2.0"
+    bs58 "^5.0.0"
+    content-type "^1.0.4"
+    loglevel "^1.7.1"
+    matrix-events-sdk "^0.0.1-beta.7"
+    p-retry "4"
+    qs "^6.9.6"
+    unhomoglyph "^1.0.6"
+
 "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
   version "20.1.0"
   resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/8eed354e17001cd25e3cafe81f74dab499a9882e"