diff --git a/matrix-meetings-bot/package.json b/matrix-meetings-bot/package.json
index a44a4c72..513be170 100644
--- a/matrix-meetings-bot/package.json
+++ b/matrix-meetings-bot/package.json
@@ -43,7 +43,7 @@
     "class-validator": "^0.14.0",
     "express": "^4.17.1",
     "html-entities": "^2.4.0",
-    "i18next": "^23.4.5",
+    "i18next": "^23.5.1",
     "i18next-fs-backend": "^2.2.0",
     "joi": "^17.11.0",
     "i18next-http-middleware": "^3.4.1",
diff --git a/matrix-meetings-widget/package.json b/matrix-meetings-widget/package.json
index 966320ed..ad17667b 100644
--- a/matrix-meetings-widget/package.json
+++ b/matrix-meetings-widget/package.json
@@ -14,23 +14,23 @@
     "@matrix-widget-toolkit/api": "^3.2.1",
     "@matrix-widget-toolkit/mui": "^1.1.5",
     "@matrix-widget-toolkit/react": "^1.0.5",
-    "@mui/icons-material": "^5.11.16",
-    "@mui/lab": "^5.0.0-alpha.140",
-    "@mui/material": "^5.13.4",
+    "@mui/icons-material": "^5.14.14",
+    "@mui/lab": "^5.0.0-alpha.149",
+    "@mui/material": "^5.14.14",
     "@mui/x-date-pickers": "^6.16.2",
     "@mui/utils": "^5.14.13",
     "@reduxjs/toolkit": "^1.9.7",
-    "i18next": "^23.4.5",
+    "i18next": "^23.5.1",
     "i18next-chained-backend": "^4.5.0",
     "i18next-http-backend": "^2.2.2",
     "joi": "^17.11.0",
     "lodash": "^4.17.20",
     "luxon": "^3.3.0",
-    "matrix-widget-api": "^1.5.0",
+    "matrix-widget-api": "^1.6.0",
     "mustache": "^4.2.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "react-i18next": "^13.2.0",
+    "react-i18next": "^13.3.0",
     "react-redux": "^8.1.3",
     "react-router-dom": "^6.16.0",
     "react-use": "^17.4.0",
diff --git a/yarn.lock b/yarn.lock
index 70cd33e2..773d06cf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1099,7 +1099,7 @@
     core-js-pure "^3.0.0"
     regenerator-runtime "^0.13.4"
 
-"@babel/runtime@^7.1.2", "@babel/runtime@^7.10.2", "@babel/runtime@^7.11.2", "@babel/runtime@^7.12.1", "@babel/runtime@^7.12.5", "@babel/runtime@^7.16.3", "@babel/runtime@^7.18.3", "@babel/runtime@^7.19.4", "@babel/runtime@^7.20.1", "@babel/runtime@^7.20.6", "@babel/runtime@^7.21.0", "@babel/runtime@^7.21.5", "@babel/runtime@^7.22.15", "@babel/runtime@^7.22.5", "@babel/runtime@^7.22.6", "@babel/runtime@^7.23.1", "@babel/runtime@^7.5.5", "@babel/runtime@^7.8.4", "@babel/runtime@^7.8.7", "@babel/runtime@^7.9.2":
+"@babel/runtime@^7.1.2", "@babel/runtime@^7.10.2", "@babel/runtime@^7.11.2", "@babel/runtime@^7.12.1", "@babel/runtime@^7.12.5", "@babel/runtime@^7.16.3", "@babel/runtime@^7.18.3", "@babel/runtime@^7.19.4", "@babel/runtime@^7.20.1", "@babel/runtime@^7.20.6", "@babel/runtime@^7.21.5", "@babel/runtime@^7.22.15", "@babel/runtime@^7.22.5", "@babel/runtime@^7.22.6", "@babel/runtime@^7.23.1", "@babel/runtime@^7.5.5", "@babel/runtime@^7.8.4", "@babel/runtime@^7.8.7", "@babel/runtime@^7.9.2":
   version "7.23.1"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.23.1.tgz#72741dc4d413338a91dcb044a86f3c0bc402646d"
   integrity sha512-hC2v6p8ZSI/W0HUzh3V8C5g+NwSKzKPtJwSpTjwl0o297GP9+ZLQSkdvHz46CM3LqyoXxq+5G9komY+eSqSO0g==
@@ -2130,121 +2130,102 @@
     strict-event-emitter "^0.2.4"
     web-encoding "^1.1.5"
 
-"@mui/base@5.0.0-beta.11":
-  version "5.0.0-beta.11"
-  resolved "https://registry.yarnpkg.com/@mui/base/-/base-5.0.0-beta.11.tgz#0124d336f1931c6cd5f0008d015df5bd8fafd3a8"
-  integrity sha512-FdKZGPd8qmC3ZNke7CNhzcEgToc02M6WYZc9hcBsNQ17bgAd3s9F//1bDDYgMVBYxDM71V0sv/hBHlOY4I1ZVA==
-  dependencies:
-    "@babel/runtime" "^7.22.6"
-    "@emotion/is-prop-valid" "^1.2.1"
-    "@mui/types" "^7.2.4"
-    "@mui/utils" "^5.14.5"
-    "@popperjs/core" "^2.11.8"
-    clsx "^2.0.0"
-    prop-types "^15.8.1"
-    react-is "^18.2.0"
-
-"@mui/base@^5.0.0-beta.17":
-  version "5.0.0-beta.18"
-  resolved "https://registry.yarnpkg.com/@mui/base/-/base-5.0.0-beta.18.tgz#f95d393cf80974e77c0823170cc15c854d5af84b"
-  integrity sha512-e9ZCy/ndhyt5MTshAS3qAUy/40UiO0jX+kAo6a+XirrPJE+rrQW+mKPSI0uyp+5z4Vh+z0pvNoJ2S2gSrNz3BQ==
+"@mui/base@5.0.0-beta.20", "@mui/base@^5.0.0-beta.17":
+  version "5.0.0-beta.20"
+  resolved "https://registry.yarnpkg.com/@mui/base/-/base-5.0.0-beta.20.tgz#14fcdfe0350f2aad06ab6c37c4c91dacaab8f600"
+  integrity sha512-CS2pUuqxST7ch9VNDCklRYDbJ3rru20Tx7na92QvVVKfu3RL4z/QLuVIc8jYGsdCnauMaeUSlFNLAJNb0yXe6w==
   dependencies:
     "@babel/runtime" "^7.23.1"
     "@floating-ui/react-dom" "^2.0.2"
-    "@mui/types" "^7.2.5"
-    "@mui/utils" "^5.14.12"
+    "@mui/types" "^7.2.6"
+    "@mui/utils" "^5.14.13"
     "@popperjs/core" "^2.11.8"
     clsx "^2.0.0"
     prop-types "^15.8.1"
 
-"@mui/core-downloads-tracker@^5.14.5":
-  version "5.14.5"
-  resolved "https://registry.yarnpkg.com/@mui/core-downloads-tracker/-/core-downloads-tracker-5.14.5.tgz#c5854b89d57520c77253a79b20b784d5c2903fb6"
-  integrity sha512-+wpGH1USwPcKMFPMvXqYPC6fEvhxM3FzxC8lyDiNK/imLyyJ6y2DPb1Oue7OGIKJWBmYBqrWWtfovrxd1aJHTA==
+"@mui/core-downloads-tracker@^5.14.14":
+  version "5.14.14"
+  resolved "https://registry.yarnpkg.com/@mui/core-downloads-tracker/-/core-downloads-tracker-5.14.14.tgz#a54894e9b4dc908ab2d59eac543219d9018448e6"
+  integrity sha512-Rw/xKiTOUgXD8hdKqj60aC6QcGprMipG7ne2giK6Mz7b4PlhL/xog9xLeclY3BxsRLkZQ05egFnIEY1CSibTbw==
 
-"@mui/icons-material@^5.11.16", "@mui/icons-material@^5.14.3":
-  version "5.14.3"
-  resolved "https://registry.yarnpkg.com/@mui/icons-material/-/icons-material-5.14.3.tgz#26a84d52ab2fceea2856adf7a139527b3a51ae90"
-  integrity sha512-XkxWPhageu1OPUm2LWjo5XqeQ0t2xfGe8EiLkRW9oz2LHMMZmijvCxulhgquUVTF1DnoSh+3KoDLSsoAFtVNVw==
+"@mui/icons-material@^5.14.14", "@mui/icons-material@^5.14.3":
+  version "5.14.14"
+  resolved "https://registry.yarnpkg.com/@mui/icons-material/-/icons-material-5.14.14.tgz#02d33f51f0b9de238d5c47b0a31ff330144393c4"
+  integrity sha512-vwuaMsKvI7AWTeYqR8wYbpXijuU8PzMAJWRAq2DDIuOZPxjKyHlr8WQ25+azZYkIXtJ7AqnVb1ZmHdEyB4/kug==
   dependencies:
-    "@babel/runtime" "^7.22.6"
+    "@babel/runtime" "^7.23.1"
 
-"@mui/lab@^5.0.0-alpha.140":
-  version "5.0.0-alpha.140"
-  resolved "https://registry.yarnpkg.com/@mui/lab/-/lab-5.0.0-alpha.140.tgz#07028563fb18715e49da973ee814da7c0976133d"
-  integrity sha512-k75jos6jklCD8tA20PAK2H4RSCKycTcR4Pbfz7JbdxIkWXJ+y2MRalwMcen1vpB99v0yZHNUo6BtGz6rvs2jlQ==
+"@mui/lab@^5.0.0-alpha.149":
+  version "5.0.0-alpha.149"
+  resolved "https://registry.yarnpkg.com/@mui/lab/-/lab-5.0.0-alpha.149.tgz#4bbdc8ba1c3b57d5a557b171463bc692b308ead2"
+  integrity sha512-azOkKcyVX4KBZAqSp7eRD4OfKrUrvQXo7x2BjFJil+UeAJiMpB6I5lALo2PDZz3vjtJnHqlURnZtxZOHs1zfEA==
   dependencies:
-    "@babel/runtime" "^7.22.6"
-    "@mui/base" "5.0.0-beta.11"
-    "@mui/system" "^5.14.5"
-    "@mui/types" "^7.2.4"
-    "@mui/utils" "^5.14.5"
+    "@babel/runtime" "^7.23.1"
+    "@mui/base" "5.0.0-beta.20"
+    "@mui/system" "^5.14.14"
+    "@mui/types" "^7.2.6"
+    "@mui/utils" "^5.14.13"
+    "@mui/x-tree-view" "6.0.0-alpha.1"
     clsx "^2.0.0"
     prop-types "^15.8.1"
-    react-is "^18.2.0"
 
-"@mui/material@^5.13.4", "@mui/material@^5.14.5":
-  version "5.14.5"
-  resolved "https://registry.yarnpkg.com/@mui/material/-/material-5.14.5.tgz#4610b381fd159cd208c28e1d1f29c303ea24a518"
-  integrity sha512-4qa4GMfuZH0Ai3mttk5ccXP8a3sf7aPlAJwyMrUSz6h9hPri6BPou94zeu3rENhhmKLby9S/W1y+pmficy8JKA==
+"@mui/material@^5.14.14", "@mui/material@^5.14.5":
+  version "5.14.14"
+  resolved "https://registry.yarnpkg.com/@mui/material/-/material-5.14.14.tgz#e47f3992b609002cd57a71f70e829dc2d286028c"
+  integrity sha512-cAmCwAHFQXxb44kWbVFkhKATN8tACgMsFwrXo8ro6WzYW73U/qsR5AcCiJIhCyYYg+gcftfkmNcpRaV3JjhHCg==
   dependencies:
-    "@babel/runtime" "^7.22.6"
-    "@mui/base" "5.0.0-beta.11"
-    "@mui/core-downloads-tracker" "^5.14.5"
-    "@mui/system" "^5.14.5"
-    "@mui/types" "^7.2.4"
-    "@mui/utils" "^5.14.5"
-    "@types/react-transition-group" "^4.4.6"
+    "@babel/runtime" "^7.23.1"
+    "@mui/base" "5.0.0-beta.20"
+    "@mui/core-downloads-tracker" "^5.14.14"
+    "@mui/system" "^5.14.14"
+    "@mui/types" "^7.2.6"
+    "@mui/utils" "^5.14.13"
+    "@types/react-transition-group" "^4.4.7"
     clsx "^2.0.0"
     csstype "^3.1.2"
     prop-types "^15.8.1"
     react-is "^18.2.0"
     react-transition-group "^4.4.5"
 
-"@mui/private-theming@^5.14.5":
-  version "5.14.5"
-  resolved "https://registry.yarnpkg.com/@mui/private-theming/-/private-theming-5.14.5.tgz#834e1569c31e2644665f98d902def79014053017"
-  integrity sha512-cC4C5RrpXpDaaZyH9QwmPhRLgz+f2SYbOty3cPkk4qPSOSfif2ZEcDD9HTENKDDd9deB+xkPKzzZhi8cxIx8Ig==
+"@mui/private-theming@^5.14.14":
+  version "5.14.14"
+  resolved "https://registry.yarnpkg.com/@mui/private-theming/-/private-theming-5.14.14.tgz#035dde1eb30c896c69a12b7dee1dce3a323c66e9"
+  integrity sha512-n77au3CQj9uu16hak2Y+rvbGSBaJKxziG/gEbOLVGrAuqZ+ycVSkorCfN6Y/4XgYOpG/xvmuiY3JwhAEOzY3iA==
   dependencies:
-    "@babel/runtime" "^7.22.6"
-    "@mui/utils" "^5.14.5"
+    "@babel/runtime" "^7.23.1"
+    "@mui/utils" "^5.14.13"
     prop-types "^15.8.1"
 
-"@mui/styled-engine@^5.13.2":
-  version "5.13.2"
-  resolved "https://registry.yarnpkg.com/@mui/styled-engine/-/styled-engine-5.13.2.tgz#c87bd61c0ab8086d34828b6defe97c02bcd642ef"
-  integrity sha512-VCYCU6xVtXOrIN8lcbuPmoG+u7FYuOERG++fpY74hPpEWkyFQG97F+/XfTQVYzlR2m7nPjnwVUgATcTCMEaMvw==
+"@mui/styled-engine@^5.14.13":
+  version "5.14.13"
+  resolved "https://registry.yarnpkg.com/@mui/styled-engine/-/styled-engine-5.14.13.tgz#4ab4ef7d86ffe8709bdce4b8b2e3dba9090da199"
+  integrity sha512-1ff/egFQl26hiwcUtCMKAkp4Sgqpm3qIewmXq+GN27fb44lDIACquehMFBuadOjceOFmbIXbayzbA46ZyqFYzA==
   dependencies:
-    "@babel/runtime" "^7.21.0"
+    "@babel/runtime" "^7.23.1"
     "@emotion/cache" "^11.11.0"
     csstype "^3.1.2"
     prop-types "^15.8.1"
 
-"@mui/system@^5.14.5":
-  version "5.14.5"
-  resolved "https://registry.yarnpkg.com/@mui/system/-/system-5.14.5.tgz#614394c4183d90df82c540e0e736ba72c1f95f8e"
-  integrity sha512-mextXZHDeGcR7E1kx43TRARrVXy+gI4wzpUgNv7MqZs1dvTVXQGVeAT6ydj9d6FUqHBPMNLGV/21vJOrpqsL+w==
+"@mui/system@^5.14.14":
+  version "5.14.14"
+  resolved "https://registry.yarnpkg.com/@mui/system/-/system-5.14.14.tgz#f33327e74230523169107ace960e8bb51cbdbab7"
+  integrity sha512-y4InFmCgGGWXnz+iK4jRTWVikY0HgYnABjz4wgiUgEa2W1H8M4ow+27BegExUWPkj4TWthQ2qG9FOGSMtI+PKA==
   dependencies:
-    "@babel/runtime" "^7.22.6"
-    "@mui/private-theming" "^5.14.5"
-    "@mui/styled-engine" "^5.13.2"
-    "@mui/types" "^7.2.4"
-    "@mui/utils" "^5.14.5"
+    "@babel/runtime" "^7.23.1"
+    "@mui/private-theming" "^5.14.14"
+    "@mui/styled-engine" "^5.14.13"
+    "@mui/types" "^7.2.6"
+    "@mui/utils" "^5.14.13"
     clsx "^2.0.0"
     csstype "^3.1.2"
     prop-types "^15.8.1"
 
-"@mui/types@^7.2.4":
-  version "7.2.4"
-  resolved "https://registry.yarnpkg.com/@mui/types/-/types-7.2.4.tgz#b6fade19323b754c5c6de679a38f068fd50b9328"
-  integrity sha512-LBcwa8rN84bKF+f5sDyku42w1NTxaPgPyYKODsh01U1fVstTClbUoSA96oyRBnSNyEiAVjKm6Gwx9vjR+xyqHA==
-
-"@mui/types@^7.2.5":
-  version "7.2.5"
-  resolved "https://registry.yarnpkg.com/@mui/types/-/types-7.2.5.tgz#cd62a1fc5eb1044137ccab2053b431dd7cfc3cb8"
-  integrity sha512-S2BwfNczr7VwS6ki8GoAXJyARoeSJDLuxOEPs3vEMyTALlf9PrdHv+sluX7kk3iKrCg/ML2mIWwapZvWbkMCQA==
+"@mui/types@^7.2.6":
+  version "7.2.6"
+  resolved "https://registry.yarnpkg.com/@mui/types/-/types-7.2.6.tgz#d72b9e9eb0032e107e76033932d65c3f731d2608"
+  integrity sha512-7sjLQrUmBwufm/M7jw/quNiPK/oor2+pGUQP2CULRcFCArYTq78oJ3D5esTaL0UMkXKJvDqXn6Ike69yAOBQng==
 
-"@mui/utils@^5.14.11", "@mui/utils@^5.14.12", "@mui/utils@^5.14.13", "@mui/utils@^5.14.5":
+"@mui/utils@^5.14.11", "@mui/utils@^5.14.13", "@mui/utils@^5.14.3", "@mui/utils@^5.14.5":
   version "5.14.13"
   resolved "https://registry.yarnpkg.com/@mui/utils/-/utils-5.14.13.tgz#42c352b342da90b44a29a83d3dbda6ee1e56a0f8"
   integrity sha512-2AFpyXWw7uDCIqRu7eU2i/EplZtks5LAMzQvIhC79sPV9IhOZU2qwOWVnPtdctRXiQJOAaXulg+A37pfhEueQw==
@@ -2267,6 +2248,18 @@
     prop-types "^15.8.1"
     react-transition-group "^4.4.5"
 
+"@mui/x-tree-view@6.0.0-alpha.1":
+  version "6.0.0-alpha.1"
+  resolved "https://registry.yarnpkg.com/@mui/x-tree-view/-/x-tree-view-6.0.0-alpha.1.tgz#fe499f8c43c01d28aca95cfb17491746ffcc3080"
+  integrity sha512-JUG3HmBrmGEALbCFg1b+i7h726e1dWYZs4db3syO1j+Q++E3nbvE4Lehp5yGTFm+8esH0Tny50tuJaa4WX6VSA==
+  dependencies:
+    "@babel/runtime" "^7.22.6"
+    "@mui/utils" "^5.14.3"
+    "@types/react-transition-group" "^4.4.6"
+    clsx "^2.0.0"
+    prop-types "^15.8.1"
+    react-transition-group "^4.4.5"
+
 "@nestjs/cli@^10.1.14":
   version "10.1.14"
   resolved "https://registry.yarnpkg.com/@nestjs/cli/-/cli-10.1.14.tgz#4a0fac72b1f8d5b6a9d20ea48d3545bf5c39bb8a"
@@ -7490,10 +7483,10 @@ i18next@^22.0.4:
   dependencies:
     "@babel/runtime" "^7.20.6"
 
-i18next@^23.4.4, i18next@^23.4.5:
-  version "23.4.5"
-  resolved "https://registry.yarnpkg.com/i18next/-/i18next-23.4.5.tgz#3405926b7cd4a4682d6521633e9f836b3d81c5e7"
-  integrity sha512-XXALnva7/5H+kg7TjDsmzY3jRypuSJvjR1eUWtt11yUgsOqjZFq/mnaujJ/XpVWhUJU75QhCUhrZqAarlYpOSQ==
+i18next@^23.4.4, i18next@^23.5.1:
+  version "23.5.1"
+  resolved "https://registry.yarnpkg.com/i18next/-/i18next-23.5.1.tgz#7f7c35ffaa907618d9489f106d5006b09fbca3d3"
+  integrity sha512-JelYzcaCoFDaa+Ysbfz2JsGAKkrHiMG6S61+HLBUEIPaF40WMwW9hCPymlQGrP+wWawKxKPuSuD71WZscCsWHg==
   dependencies:
     "@babel/runtime" "^7.22.5"
 
@@ -9120,10 +9113,10 @@ matrix-bot-sdk@^0.6.6:
     request-promise "^4.2.6"
     sanitize-html "^2.8.0"
 
-matrix-widget-api@^1.3.1, matrix-widget-api@^1.5.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.5.0.tgz#4ae3e46a7f2854f944ddaf8a5af63d72fba76c45"
-  integrity sha512-hKGfqQKK5qVMwW0Sp8l2TiuW8UuHafTvUZNSWBPghedB/rSFbVLlr0mufuEV0iq/pQ7ChW96q/WEC6Llie4SnA==
+matrix-widget-api@^1.3.1, matrix-widget-api@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.6.0.tgz#f0075411edffc6de339580ade7e6e6e6edb01af4"
+  integrity sha512-VXIJyAZ/WnBmT4C7ePqevgMYGneKMCP/0JuCOqntSsaNlCRHJvwvTxmqUU+ufOpzIF5gYNyIrAjbgrEbK3iqJQ==
   dependencies:
     "@types/events" "^3.0.0"
     events "^3.2.0"
@@ -11063,10 +11056,10 @@ react-error-overlay@^6.0.11:
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-6.0.11.tgz#92835de5841c5cf08ba00ddd2d677b6d17ff9adb"
   integrity sha512-/6UZ2qgEyH2aqzYZgQPxEnz33NJ2gNsnHA2o5+o4wW9bLM/JYQitNP9xPhsXwC08hMMovfGe/8retsdDsczPRg==
 
-react-i18next@*, react-i18next@^13.1.2, react-i18next@^13.2.0:
-  version "13.2.0"
-  resolved "https://registry.yarnpkg.com/react-i18next/-/react-i18next-13.2.0.tgz#9d7a574144738e46dd4c66573907f56942435ced"
-  integrity sha512-YD8xMc+I0jkHHLotd8ERMzZ53hMaCBVLCndbcbBveJn3FbppRP4jyYOAkmR8XItN01sTD9ilAjoEjpH1i42IgA==
+react-i18next@*, react-i18next@^13.1.2, react-i18next@^13.3.0:
+  version "13.3.0"
+  resolved "https://registry.yarnpkg.com/react-i18next/-/react-i18next-13.3.0.tgz#8e39c0101f654db7eb971f159bb55067a78925c3"
+  integrity sha512-FlR9xjYHSPIJfQspEmkN0yOlxgRyNuiJKJ8gCaZH08UJ7SZHG+VrptEPcpEMEchjNoCOZdKcvJ3PnmHEZhkeXg==
   dependencies:
     "@babel/runtime" "^7.22.5"
     html-parse-stringify "^3.0.1"