diff --git a/package.json b/package.json
index c96942a462..de1555face 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "katex": "^0.12.0",
     "linkifyjs": "^2.1.9",
     "lodash": "^4.17.20",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "matrix-js-sdk": "15.1.1-rc.1",
     "matrix-widget-api": "^0.1.0-beta.17",
     "minimist": "^1.2.5",
     "opus-recorder": "^8.0.3",
diff --git a/yarn.lock b/yarn.lock
index 7140510564..6e05018c8a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5869,9 +5869,10 @@ mathml-tag-names@^2.1.3:
   resolved "https://registry.yarnpkg.com/mathml-tag-names/-/mathml-tag-names-2.1.3.tgz#4ddadd67308e780cf16a47685878ee27b736a0a3"
   integrity sha512-APMBEanjybaPzUrfqU0IMU5I0AswKMH7k8OTLs0vvV4KZpExkTkY87nR/zpbuTPj+gARop7aGUbl11pnDfW6xg==
 
-"matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
-  version "15.1.0"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/1dc899ba6ec52cab3fed9783e892e62ffc93c5a7"
+matrix-js-sdk@15.1.1-rc.1:
+  version "15.1.1-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-15.1.1-rc.1.tgz#64c3b80cfa613ad415f779aa262f8cdd1bf582dc"
+  integrity sha512-b7shzZXwm1UCClvNxzuEpSInihI8fZSiEuKf/WaW+ITlcavVfhzXdogs6trrLBHS7/qP9gbNF781t/Q+APjDpQ==
   dependencies:
     "@babel/runtime" "^7.12.5"
     another-json "^0.2.0"