diff --git a/package.json b/package.json
index 705e5c4df1..9db540bce3 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "gfm.css": "^1.1.2",
     "jsrsasign": "^10.2.0",
     "katex": "^0.12.0",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "matrix-js-sdk": "15.3.0-rc.1",
     "matrix-react-sdk": "github:matrix-org/matrix-react-sdk#develop",
     "matrix-widget-api": "^0.1.0-beta.18",
     "prop-types": "^15.7.2",
diff --git a/yarn.lock b/yarn.lock
index 31e70fa56d..c50a666de7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8024,6 +8024,23 @@ mathml-tag-names@^2.1.3:
   version "0.0.1"
   resolved "https://github.com/matrix-org/matrix-analytics-events.git#1eab4356548c97722a183912fda1ceabbe8cc7c1"
 
+matrix-js-sdk@15.3.0-rc.1:
+  version "15.3.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-15.3.0-rc.1.tgz#4d5e8aac34aaf9dcefc74ef732ec6d4307f64b27"
+  integrity sha512-MGEDW3Dyz3Y/6Z+GlfnmT1n0DTtTulZ0CQXO6xlkYT8TYaFE9yLBw1zkarJfdnQp5YsjcEbYZa1ZJt1smz4rQg==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+    another-json "^0.2.0"
+    browser-request "^0.3.3"
+    bs58 "^4.0.1"
+    content-type "^1.0.4"
+    eslint-plugin-import "^2.25.2"
+    loglevel "^1.7.1"
+    p-retry "^4.5.0"
+    qs "^6.9.6"
+    request "^2.88.2"
+    unhomoglyph "^1.0.6"
+
 "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
   version "15.2.0"
   resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/c0fbed914e454f1dfac9bdd5dec7165f90b0e3e4"
@@ -8033,6 +8050,7 @@ mathml-tag-names@^2.1.3:
     browser-request "^0.3.3"
     bs58 "^4.0.1"
     content-type "^1.0.4"
+    eslint-plugin-import "^2.25.2"
     loglevel "^1.7.1"
     p-retry "^4.5.0"
     qs "^6.9.6"