diff --git a/src/translation/translate.js b/src/translation/translate.js
index 973637b..9fd16e3 100644
--- a/src/translation/translate.js
+++ b/src/translation/translate.js
@@ -302,6 +302,9 @@ Zotero.Translate.Sandbox = {
 			var translation = Zotero.Translate.newInstance(type);
 			translation._parentTranslator = translate;
 			translation.setTranslatorProvider(translate._translatorProvider);
+			if (translation instanceof Zotero.Translate.Web || translation instanceof Zotero.Translate.Search) {
+				translation.setRequestTimeout(translate.requestTimeout);
+			}
 			
 			if(translation instanceof Zotero.Translate.Export && !(translation instanceof Zotero.Translate.Export)) {
 				throw(new Error("Only export translators may call other export translators"));
@@ -2041,6 +2044,15 @@ Zotero.Translate.Web.prototype.setRequestHeaders = function (headers) {
 	this.requestHeaders = headers;
 };
 
+/**
+ * Set a timeout on translator HTTP requests.
+ * @param {Number | null | undefined} requestTimeout Timeout in milliseconds; 0 to disable;
+ * 		null/undefined to use implementation default
+ */
+Zotero.Translate.Web.prototype.setRequestTimeout = function (requestTimeout) {
+	this.requestTimeout = requestTimeout;
+};
+
 /**
  * Sets the location to operate upon
  *
@@ -2621,6 +2633,11 @@ Zotero.Translate.Search.prototype.ERROR_NO_RESULTS = "No items returned from any
  */
 Zotero.Translate.Search.prototype.setCookieSandbox = Zotero.Translate.Web.prototype.setCookieSandbox;
 
+/**
+ * @borrows Zotero.Translate.Web#setRequestTimeout
+ */
+Zotero.Translate.Search.prototype.setRequestTimeout = Zotero.Translate.Web.prototype.setRequestTimeout;
+
 /**
  * Sets the item to be used for searching
  * @param {Object} item An item, with as many fields as desired, in the format returned by
diff --git a/src/utilities_translate.js b/src/utilities_translate.js
index f76eb72..efbdd3d 100644
--- a/src/utilities_translate.js
+++ b/src/utilities_translate.js
@@ -312,7 +312,8 @@ Zotero.Utilities.Translate.prototype.request = async function (url, options = {}
 		body: options.body,
 		responseCharset: options.responseCharset,
 		responseType: options.responseType,
-		cookieSandbox: this._translate.cookieSandbox
+		cookieSandbox: this._translate.cookieSandbox,
+		timeout: this._translate.requestTimeout,
 	};
 
 	// If the request fails or a non-2XX status is returned, Zotero.HTTP.request rejects its promise.
@@ -426,6 +427,9 @@ Zotero.Utilities.Translate.prototype.doGet = function(urls, processor, done, res
 			translate.complete(false, e);
 		}
 	}, responseCharset, this._translate.cookieSandbox, Object.assign({}, this._translate.requestHeaders, requestHeaders));
+	if (translate.requestTimeout !== 0) {
+		xmlhttp.timeout = translate.requestTimeout || xmlhttp.timeout || 30000;
+	}
 }
 
 /**
@@ -461,6 +465,9 @@ Zotero.Utilities.Translate.prototype.doPost = function(url, body, onDone, header
 			translate.complete(false, e);
 		}
 	}, Object.assign({}, translate.requestHeaders, headers), responseCharset, translate.cookieSandbox ? translate.cookieSandbox : undefined);
+	if (translate.requestTimeout !== 0) {
+		xmlhttp.timeout = translate.requestTimeout || xmlhttp.timeout || 30000;
+	}
 }
 
 Zotero.Utilities.Translate.prototype.urlToProxy = function(url) {