diff --git a/package-lock.json b/package-lock.json
index 1d0052a5..90312a89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,7 +23,7 @@
         "matrix-js-sdk": "^15.4.0",
         "micromark": "^3.0.3",
         "micromark-extension-gfm": "^1.0.0",
-        "prop-types": "^15.7.2",
+        "prop-types": "^15.8.1",
         "react": "^17.0.2",
         "react-autosize-textarea": "^7.1.0",
         "react-dom": "^17.0.2",
@@ -12699,13 +12699,13 @@
       "dev": true
     },
     "node_modules/prop-types": {
-      "version": "15.7.2",
-      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
-      "integrity": "sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==",
+      "version": "15.8.1",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
+      "integrity": "sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==",
       "dependencies": {
         "loose-envify": "^1.4.0",
         "object-assign": "^4.1.1",
-        "react-is": "^16.8.1"
+        "react-is": "^16.13.1"
       }
     },
     "node_modules/proxy-addr": {
@@ -25870,13 +25870,13 @@
       "dev": true
     },
     "prop-types": {
-      "version": "15.7.2",
-      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
-      "integrity": "sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==",
+      "version": "15.8.1",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
+      "integrity": "sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==",
       "requires": {
         "loose-envify": "^1.4.0",
         "object-assign": "^4.1.1",
-        "react-is": "^16.8.1"
+        "react-is": "^16.13.1"
       }
     },
     "proxy-addr": {
diff --git a/package.json b/package.json
index 1875fdb3..cef77b91 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "matrix-js-sdk": "^15.4.0",
     "micromark": "^3.0.3",
     "micromark-extension-gfm": "^1.0.0",
-    "prop-types": "^15.7.2",
+    "prop-types": "^15.8.1",
     "react": "^17.0.2",
     "react-autosize-textarea": "^7.1.0",
     "react-dom": "^17.0.2",