diff --git a/package.json b/package.json
index 43b16416..47831709 100644
--- a/package.json
+++ b/package.json
@@ -74,8 +74,8 @@
     "gemini-scrollbar": "github:matrix-org/gemini-scrollbar#b302279",
     "gfm.css": "^1.1.2",
     "highlight.js": "^9.13.1",
-    "matrix-js-sdk": "2.2.0",
-    "matrix-react-sdk": "1.4.0",
+    "matrix-js-sdk": "2.3.0-rc.1",
+    "matrix-react-sdk": "1.5.0-rc.1",
     "modernizr": "^3.6.0",
     "olm": "https://packages.matrix.org/npm/olm/olm-3.1.0.tgz",
     "prop-types": "^15.6.2",
diff --git a/yarn.lock b/yarn.lock
index 2140bdab..9779acde 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2276,7 +2276,7 @@ commander@2.17.x:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
   integrity sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==
 
-commander@^2.11.0, commander@^2.20.0:
+commander@^2.11.0, commander@^2.19.0, commander@^2.20.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -2893,6 +2893,18 @@ di@^0.0.1:
   resolved "https://registry.yarnpkg.com/di/-/di-0.0.1.tgz#806649326ceaa7caa3306d75d985ea2748ba913c"
   integrity sha1-gGZJMmzqp8qjMG112YXqJ0i6kTw=
 
+diff-dom@^4.1.3:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/diff-dom/-/diff-dom-4.1.3.tgz#5572dab5c549c7da05a7662303b471d7ea4b0963"
+  integrity sha512-wiM06O2BN3THf9Ge86IYuTek+OlKLSwwuwjm3XfSr7SGp7Ls9XXztpr4tp9S54RhX/rXqq94LdeBG+MMpDPDig==
+  dependencies:
+    rollup-plugin-terser "^4.0.3"
+
+diff-match-patch@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/diff-match-patch/-/diff-match-patch-1.0.4.tgz#6ac4b55237463761c4daf0dc603eb869124744b1"
+  integrity sha512-Uv3SW8bmH9nAtHKaKSanOQmj2DnlH65fUpcrMdfdaOxUG02QQ4YGZ8AE7kKOMisF7UqvOlGKVYWRvezdncW9lg==
+
 diff@3.5.0:
   version "3.5.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
@@ -3180,10 +3192,10 @@ emoji-regex@^7.0.1:
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-7.0.3.tgz#933a04052860c85e83c122479c4748a8e4c72156"
   integrity sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==
 
-emojibase-data@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/emojibase-data/-/emojibase-data-4.0.0.tgz#3feb3e5bb5e5f2b6373b183b0f038c60889a9e29"
-  integrity sha512-Yi4A1IxB7iZ+09Wqr2BEpHSQfugc5I8G+wckDOhCia0F7oOdErf/85jCwbpRQy7xtBbvlyS3xQrYedSeQot5Og==
+emojibase-data@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/emojibase-data/-/emojibase-data-4.0.1.tgz#7ff28250a9b753f058de313ac4654b37bbf7081b"
+  integrity sha512-U20Xg5TzdJ1pQnfJUT3rf9vqA9jL0GLALP8YsypyNdud2h5CWXUwpRRicRl8y0lOnABQbheLv3ohwt1+Mn8iTw==
 
 emojibase-regex@^3.0.0:
   version "3.0.0"
@@ -5293,6 +5305,14 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
+jest-worker@^24.0.0:
+  version "24.6.0"
+  resolved "https://registry.yarnpkg.com/jest-worker/-/jest-worker-24.6.0.tgz#7f81ceae34b7cde0c9827a6980c35b7cdc0161b3"
+  integrity sha512-jDwgW5W9qGNvpI1tNnvajh0a5IE/PuGLFmHk6aR/BZFz8tSgGw17GsDPXAJ6p91IvYDjOw8GpFbvvZGAK+DPQQ==
+  dependencies:
+    merge-stream "^1.0.1"
+    supports-color "^6.1.0"
+
 jquery@^3.3.1:
   version "3.4.1"
   resolved "https://registry.yarnpkg.com/jquery/-/jquery-3.4.1.tgz#714f1f8d9dde4bdfa55764ba37ef214630d80ef2"
@@ -5847,10 +5867,10 @@ math-random@^1.0.1:
   resolved "https://registry.yarnpkg.com/math-random/-/math-random-1.0.4.tgz#5dd6943c938548267016d4e34f057583080c514c"
   integrity sha512-rUxjysqif/BZQH2yhd5Aaq7vXMSx9NdEsQcyA07uEzIvxgI7zIr33gGsh+RU0/XjmQpCW7RsVof1vlkvQVCK5A==
 
-matrix-js-sdk@2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-2.2.0.tgz#c96a2caa4c92e5998443027579d7e76d4bcd4d21"
-  integrity sha512-gab7wuscgTKbXY5x136t9qSnDbOuq785ezd++NoFLEau0YjDos0YKolAm0TValUC9LY30CoVqqMfyPJ68CMezQ==
+matrix-js-sdk@2.3.0-rc.1:
+  version "2.3.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-2.3.0-rc.1.tgz#fe90e3c60f17dacea6454786269a1ba497d8d401"
+  integrity sha512-lxk/aBNrTklG5Ya8vhc8kbBL2jrPU1vvDZ87GXVMGL3L1Cg3oNnClJXqyf/MwnY8egfqHWLrMsQRSerOPVgnEQ==
   dependencies:
     another-json "^0.2.0"
     babel-runtime "^6.26.0"
@@ -5871,10 +5891,10 @@ matrix-mock-request@^1.2.3:
     bluebird "^3.5.0"
     expect "^1.20.2"
 
-matrix-react-sdk@1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/matrix-react-sdk/-/matrix-react-sdk-1.4.0.tgz#dd7a6b9f73355174eeba37ce4ae4eb8bba98d57d"
-  integrity sha512-kZIkTU4tYNzOJX0hcWRWiyswuHJBP2svnbDg+GvCXFsDKZM566G3Hg5gU11QFVFAmQokO3DVazpQi6nlKt5dCg==
+matrix-react-sdk@1.5.0-rc.1:
+  version "1.5.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-react-sdk/-/matrix-react-sdk-1.5.0-rc.1.tgz#578241e3e0968580011202304dd0c4152bef102e"
+  integrity sha512-tzH098TVsk8VNnouGCeIFLiDaPcljXz2UCFkLmVkBQ9bYJ6Yheqc0PShrpI0yyfnMwOjmTDNo8PKhOo1jV3yng==
   dependencies:
     babel-plugin-syntax-dynamic-import "^6.18.0"
     babel-runtime "^6.26.0"
@@ -5885,7 +5905,9 @@ matrix-react-sdk@1.4.0:
     classnames "^2.1.2"
     commonmark "^0.28.1"
     counterpart "^0.18.0"
-    emojibase-data "^4.0.0"
+    diff-dom "^4.1.3"
+    diff-match-patch "^1.0.4"
+    emojibase-data "^4.0.1"
     emojibase-regex "^3.0.0"
     file-saver "^1.3.3"
     filesize "3.5.6"
@@ -5901,7 +5923,7 @@ matrix-react-sdk@1.4.0:
     linkifyjs "^2.1.6"
     lodash "^4.17.14"
     lolex "2.3.2"
-    matrix-js-sdk "2.2.0"
+    matrix-js-sdk "2.3.0-rc.1"
     optimist "^0.6.1"
     pako "^1.0.5"
     png-chunks-extract "^1.0.0"
@@ -5985,6 +6007,13 @@ merge-descriptors@1.0.1:
   resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-1.0.1.tgz#b00aaa556dd8b44568150ec9d1b953f3f90cbb61"
   integrity sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E=
 
+merge-stream@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/merge-stream/-/merge-stream-1.0.1.tgz#4041202d508a342ba00174008df0c251b8c135e1"
+  integrity sha1-QEEgLVCKNCugAXQAjfDCUbjBNeE=
+  dependencies:
+    readable-stream "^2.0.1"
+
 merge2@^1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.2.3.tgz#7ee99dbd69bb6481689253f018488a1b902b0ed5"
@@ -7852,6 +7881,16 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
+rollup-plugin-terser@^4.0.3:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-terser/-/rollup-plugin-terser-4.0.4.tgz#6f661ef284fa7c27963d242601691dc3d23f994e"
+  integrity sha512-wPANT5XKVJJ8RDUN0+wIr7UPd0lIXBo4UdJ59VmlPCtlFsE20AM+14pe+tk7YunCsWEiuzkDBY3QIkSCjtrPXg==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    jest-worker "^24.0.0"
+    serialize-javascript "^1.6.1"
+    terser "^3.14.1"
+
 run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"
@@ -8001,7 +8040,7 @@ send@0.17.1:
     range-parser "~1.2.1"
     statuses "~1.5.0"
 
-serialize-javascript@^1.7.0:
+serialize-javascript@^1.6.1, serialize-javascript@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.7.0.tgz#d6e0dfb2a3832a8c94468e6eb1db97e55a192a65"
   integrity sha512-ke8UG8ulpFOxO8f8gRYabHQe/ZntKlcig2Mp+8+URDP1D8vJZ0KUt7LYo07q25Z/+JVSgpr/cui9PIp5H6/+nA==
@@ -8330,6 +8369,14 @@ source-map-support@^0.5.12, source-map-support@~0.5.12:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
 
+source-map-support@~0.5.10:
+  version "0.5.13"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.13.tgz#31b24a9c2e73c2de85066c0feb7d44767ed52932"
+  integrity sha512-SHSKFHadjVA5oR4PPqhtAVdcBWwRYVd6g6cAXnIbRiIwc2EhPrTuKUBdSLvlEKyIP3GCf89fltvcZiP9MMFA1w==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
@@ -8718,6 +8765,15 @@ terser-webpack-plugin@^1.1.0:
     webpack-sources "^1.3.0"
     worker-farm "^1.7.0"
 
+terser@^3.14.1:
+  version "3.17.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.17.0.tgz#f88ffbeda0deb5637f9d24b0da66f4e15ab10cb2"
+  integrity sha512-/FQzzPJmCpjAH9Xvk2paiWrFq+5M6aVOf+2KRbwhByISDX/EujxsK+BAvrhb6H+2rtrLCHK9N01wO014vrIwVQ==
+  dependencies:
+    commander "^2.19.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.10"
+
 terser@^4.0.0:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/terser/-/terser-4.1.2.tgz#b2656c8a506f7ce805a3f300a2ff48db022fa391"