diff --git a/package.json b/package.json
index e5c26a8..9471442 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "color-hash": "^2.0.1",
     "events": "^3.3.0",
     "lodash-move": "^1.1.1",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#dbkr/ptt",
+    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#robertlong/group-call",
     "mermaid": "^8.13.8",
     "normalize.css": "^8.0.1",
     "pako": "^2.0.4",
diff --git a/yarn.lock b/yarn.lock
index 7f5dc08..2de0bb3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8012,9 +8012,9 @@ markdown-to-jsx@^7.1.3:
   resolved "https://registry.yarnpkg.com/markdown-to-jsx/-/markdown-to-jsx-7.1.6.tgz#421487df2a66fe4231d94db653a34da033691e62"
   integrity sha512-1wrIGZYwIG2gR3yfRmbr4FlQmhaAKoKTpRo4wur4fp9p0njU1Hi7vR8fj0AUKKIcPduiJmPprzmCB5B/GvlC7g==
 
-"matrix-js-sdk@github:matrix-org/matrix-js-sdk#dbkr/ptt":
+"matrix-js-sdk@github:matrix-org/matrix-js-sdk#robertlong/group-call":
   version "15.1.0"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/cc60492376f2622533b0523d87ed4626a2608e30"
+  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/8d9cd0fcb37188f63a938f4dd16e1f4e967cf1b6"
   dependencies:
     "@babel/runtime" "^7.12.5"
     another-json "^0.2.0"