diff --git a/chrome/content/zotero/xpcom/retractions.js b/chrome/content/zotero/xpcom/retractions.js
index 89f8a47cbf..32e4d561b9 100644
--- a/chrome/content/zotero/xpcom/retractions.js
+++ b/chrome/content/zotero/xpcom/retractions.js
@@ -525,9 +525,10 @@ Zotero.Retractions = {
 			return;
 		}
 		
-		// Download list
+		// Download list. Skip the conditional request if the cached list was saved by a
+		// different version, so that a version bump forces a full refresh of stored data.
 		var headers = {};
-		if (this._cacheETag) {
+		if (this._cacheETag && this._cacheVersion == this._version) {
 			headers["If-None-Match"] = this._cacheETag;
 		}
 		var req = await Zotero.HTTP.request(
diff --git a/test/tests/retractionsTest.js b/test/tests/retractionsTest.js
index 434e280c9f..a575bd54d7 100644
--- a/test/tests/retractionsTest.js
+++ b/test/tests/retractionsTest.js
@@ -199,6 +199,64 @@ describe("Retractions", function () {
 			
 			assert.isFalse(Zotero.Retractions.isRetracted(item));
 		});
+		
+		it("should refresh stored data for a version bump when the list is unchanged", async function () {
+			var doi = '10.1234/cdefg';
+			var hash = Zotero.Utilities.Internal.sha1(doi);
+			var line = Zotero.Retractions.TYPE_DOI + hash.substr(0, 5) + ' 12345\n';
+			var version = Zotero.Retractions._version;
+			var reason = "Error in Data";
+			
+			server.respond(function (req) {
+				if (req.method == 'GET' && req.url == baseURL + 'list') {
+					// The list itself never changes, so a conditional request gets a 304
+					if (req.requestHeaders['If-None-Match'] == 'unchanged') {
+						req.respond(304, {}, '');
+						return;
+					}
+					req.respond(200, { 'Content-Type': 'text/plain', 'ETag': 'unchanged' }, line);
+				}
+				else if (req.method == 'POST' && req.url == baseURL + 'search') {
+					req.respond(
+						200,
+						{ 'Content-Type': 'application/json' },
+						JSON.stringify([
+							{
+								doi: hash,
+								retractionDOI: '10.1234/defgh',
+								date: '2019-01-02',
+								reasons: [reason],
+								urls: []
+							}
+						])
+					);
+				}
+			});
+			
+			try {
+				await Zotero.Retractions.updateFromServer();
+				
+				let promise = waitForItemEvent('refresh');
+				let item = createUnsavedDataObject('item', { itemType: 'journalArticle' });
+				item.setField('DOI', doi);
+				await item.saveTx();
+				await promise;
+				assert.sameMembers((await Zotero.Retractions.getData(item)).reasons, [reason]);
+				
+				// An update with the same version gets a 304 and leaves the stored data alone
+				reason = "Error in Text";
+				await Zotero.Retractions.updateFromServer();
+				assert.sameMembers((await Zotero.Retractions.getData(item)).reasons, ["Error in Data"]);
+				
+				// A version bump skips the conditional request and rewrites it
+				Zotero.Retractions._version = version + 1;
+				await Zotero.Retractions.updateFromServer();
+				assert.sameMembers((await Zotero.Retractions.getData(item)).reasons, [reason]);
+			}
+			finally {
+				Zotero.Retractions._version = version;
+			}
+		});
 	});