diff --git a/chrome/content/zotero/preferences/librariesToSync.xhtml b/chrome/content/zotero/preferences/librariesToSync.xhtml
index 6a8a3fb186..f5466c5c8b 100644
--- a/chrome/content/zotero/preferences/librariesToSync.xhtml
+++ b/chrome/content/zotero/preferences/librariesToSync.xhtml
@@ -51,7 +51,7 @@
 
 	<label style="font-size: 14px; margin-bottom: 0.5em;" value="&zotero.preferences.sync.librariesToSync;"/>
 	
-	<hbox class="virtualized-table-container" flex="1" height="200" width="600">
+	<hbox class="virtualized-table-container" style="display: flex; min-height: 200px; min-width: 600px;">
 		<html:div id="libraries-to-sync-tree"/>
 	</hbox>
 	
diff --git a/chrome/content/zotero/preferences/preferences_sync.jsx b/chrome/content/zotero/preferences/preferences_sync.jsx
index cc643d53d3..1609fb5e71 100644
--- a/chrome/content/zotero/preferences/preferences_sync.jsx
+++ b/chrome/content/zotero/preferences/preferences_sync.jsx
@@ -273,7 +273,7 @@ Zotero_Preferences.Sync = {
 				label: "zotero.preferences.sync.librariesToSync.sync",
 				fixedWidth: true,
 				// TODO: Specify in ems?
-				width: '45'
+				width: '50'
 			},
 			{
 				dataKey: "name",