diff --git a/package.json b/package.json
index cbb8a33480..e40dea659e 100644
--- a/package.json
+++ b/package.json
@@ -127,7 +127,7 @@
         "matrix-encrypt-attachment": "^1.0.3",
         "matrix-events-sdk": "0.0.1",
         "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
-        "matrix-widget-api": "^1.9.0",
+        "matrix-widget-api": "^1.10.0",
         "memoize-one": "^6.0.0",
         "oidc-client-ts": "^3.0.1",
         "opus-recorder": "^8.0.3",
diff --git a/src/stores/widgets/StopGapWidgetDriver.ts b/src/stores/widgets/StopGapWidgetDriver.ts
index 09553b40ce..5bc2ac7fc0 100644
--- a/src/stores/widgets/StopGapWidgetDriver.ts
+++ b/src/stores/widgets/StopGapWidgetDriver.ts
@@ -24,6 +24,7 @@ import {
     WidgetDriver,
     WidgetEventCapability,
     WidgetKind,
+    IWidgetApiErrorResponseDataDetails,
     ISearchUserDirectoryResult,
     IGetMediaConfigResult,
     UpdateDelayedEventAction,
@@ -33,6 +34,7 @@ import {
     ITurnServer as IClientTurnServer,
     EventType,
     IContent,
+    MatrixError,
     MatrixEvent,
     Room,
     Direction,
@@ -689,4 +691,15 @@ export class StopGapWidgetDriver extends WidgetDriver {
         const blob = await response.blob();
         return { file: blob };
     }
+
+    /**
+     * Expresses a {@link MatrixError} as a JSON payload
+     * for use by Widget API error responses.
+     * @param error The error to handle.
+     * @returns The error expressed as a JSON payload,
+     * or undefined if it is not a {@link MatrixError}.
+     */
+    public processError(error: unknown): IWidgetApiErrorResponseDataDetails | undefined {
+        return error instanceof MatrixError ? { matrix_api_error: error.asWidgetApiErrorData() } : undefined;
+    }
 }
diff --git a/yarn.lock b/yarn.lock
index 343a0f3ef4..c5ef6a55e7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8309,7 +8309,7 @@ matrix-events-sdk@0.0.1:
 
 "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
   version "34.10.0"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/5a1488ebd5552817b1e95265afe7b3baac1231a2"
+  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/6855ace6422082d173438cb23368d2fabc6a1086"
   dependencies:
     "@babel/runtime" "^7.12.5"
     "@matrix-org/matrix-sdk-crypto-wasm" "^9.0.0"
@@ -8320,7 +8320,7 @@ matrix-events-sdk@0.0.1:
     jwt-decode "^4.0.0"
     loglevel "^1.7.1"
     matrix-events-sdk "0.0.1"
-    matrix-widget-api "^1.8.2"
+    matrix-widget-api "^1.10.0"
     oidc-client-ts "^3.0.1"
     p-retry "4"
     sdp-transform "^2.14.1"
@@ -8345,10 +8345,10 @@ matrix-web-i18n@^3.2.1:
     minimist "^1.2.8"
     walk "^2.3.15"
 
-matrix-widget-api@^1.8.2, matrix-widget-api@^1.9.0:
-  version "1.9.0"
-  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.9.0.tgz#884136b405bd3c56e4ea285095c9e01ec52b6b1f"
-  integrity sha512-au8mqralNDqrEvaVAkU37bXOb8I9SCe+ACdPk11QWw58FKstVq31q2wRz+qWA6J+42KJ6s1DggWbG/S3fEs3jw==
+matrix-widget-api@^1.10.0:
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.10.0.tgz#d31ea073a5871a1fb1a511ef900b0c125a37bf55"
+  integrity sha512-rkAJ29briYV7TJnfBVLVSKtpeBrBju15JZFSDP6wj8YdbCu1bdmlplJayQ+vYaw1x4fzI49Q+Nz3E85s46sRDw==
   dependencies:
     "@types/events" "^3.0.0"
     events "^3.2.0"