diff --git a/package-lock.json b/package-lock.json
index 7bb70f6287..7dbd129291 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,7 +24,7 @@
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-      "integrity": "sha1-vhYedsNU9veIrkBx9j806MTwpCo=",
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@@ -21526,7 +21580,8 @@
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+      "dev": true
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@@ -21923,7 +21978,8 @@
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-      "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns="
+      "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=",
+      "dev": true
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@@ -22377,7 +22433,8 @@
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+      "integrity": "sha512-RIdOzyoavK+hA18OGGWDqUTsCLhtA7IcZ/6NCs4fFJaHBDab+pDDmDIByWFRQJq2Cd7r1OoQxBGKOaztq+hjIQ==",
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@@ -22414,7 +22471,8 @@
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+      "dev": true
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@@ -22769,6 +22827,7 @@
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+      "dev": true,
       "requires": {
         "aws-sign2": "~0.7.0",
         "aws4": "^1.8.0",
@@ -22795,7 +22854,8 @@
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           "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
+          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
+          "dev": true
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@@ -22988,12 +23048,14 @@
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-      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
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+      "dev": true
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     "safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
     },
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@@ -23421,6 +23483,7 @@
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+      "dev": true,
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         "assert-plus": "^1.0.0",
@@ -23868,6 +23931,7 @@
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       "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
+      "dev": true,
       "requires": {
         "psl": "^1.1.28",
         "punycode": "^2.1.1"
@@ -23906,6 +23970,7 @@
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       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
       "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
+      "dev": true,
       "requires": {
         "safe-buffer": "^5.0.1"
       }
@@ -23913,7 +23978,8 @@
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       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
+      "dev": true
     },
     "twemoji": {
       "version": "14.0.2",
@@ -24033,6 +24099,7 @@
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       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
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+      "dev": true,
       "requires": {
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       }
@@ -24116,7 +24183,8 @@
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       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
-      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+      "dev": true
     },
     "uvu": {
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@@ -24146,6 +24214,7 @@
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       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "dev": true,
       "requires": {
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         "core-util-is": "1.0.2",
diff --git a/package.json b/package.json
index ad1d799f77..d8aaab3092 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "katex": "^0.15.6",
     "linkify-html": "^4.0.0-beta.5",
     "linkifyjs": "^4.0.0-beta.5",
-    "matrix-js-sdk": "^18.1.0",
+    "matrix-js-sdk": "^21.1.0",
     "micromark": "^3.0.10",
     "micromark-extension-gfm": "^2.0.1",
     "micromark-extension-math": "^2.0.2",