diff --git a/package.json b/package.json
index 16c014100b..dc740937f0 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "gfm.css": "^1.1.2",
     "highlight.js": "^9.13.1",
     "jsrsasign": "^9.1.5",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "matrix-js-sdk": "9.1.0-rc.1",
     "matrix-react-sdk": "github:matrix-org/matrix-react-sdk#develop",
     "matrix-widget-api": "^0.1.0-beta.5",
     "olm": "https://packages.matrix.org/npm/olm/olm-3.2.1.tgz",
diff --git a/yarn.lock b/yarn.lock
index 1a29b8b678..184aa2b513 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7898,6 +7898,21 @@ mathml-tag-names@^2.1.1:
   resolved "https://registry.yarnpkg.com/mathml-tag-names/-/mathml-tag-names-2.1.3.tgz#4ddadd67308e780cf16a47685878ee27b736a0a3"
   integrity sha512-APMBEanjybaPzUrfqU0IMU5I0AswKMH7k8OTLs0vvV4KZpExkTkY87nR/zpbuTPj+gARop7aGUbl11pnDfW6xg==
 
+matrix-js-sdk@9.1.0-rc.1:
+  version "9.1.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-9.1.0-rc.1.tgz#cbdad0d272152a27bb32fe74e02ad069717d2554"
+  integrity sha512-Y0ftnH3HtMaNPFyfYqbrhS6aZkdQxxeluErFmOmpMTRGuMiIGrqhdWP8Z/MCZMRP4NPAh/dN2eW0vgqH9ij52A==
+  dependencies:
+    "@babel/runtime" "^7.11.2"
+    another-json "^0.2.0"
+    browser-request "^0.3.3"
+    bs58 "^4.0.1"
+    content-type "^1.0.4"
+    loglevel "^1.7.0"
+    qs "^6.9.4"
+    request "^2.88.2"
+    unhomoglyph "^1.0.6"
+
 "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
   version "9.0.1"
   resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/f8863d5c2488a31a093f5a1b11761d7ac3829470"