diff --git a/Appcasts/netnewswire-5.1-beta.xml b/Appcasts/netnewswire-5.1-beta.xml
index a8e718b3f..b07c8d46a 100755
--- a/Appcasts/netnewswire-5.1-beta.xml
+++ b/Appcasts/netnewswire-5.1-beta.xml
@@ -7,7 +7,26 @@
         <language>en</language>
 
 <item>
-	<title>NetNewsWire 5.1b1</title>
+	<title>NetNewsWire 5.1b2</title>
+	<description><![CDATA[
+<p><b>Important note!</b> If you created an account using a previous 5.1 test build, <b>you will have to create it again.</b></p>
+
+<p>This is because we turned off sandboxing in this build, and sandboxing changes the location of your data.</p>
+
+<p>(We turned off sandboxing due to crashes we didn’t feel we could investigate and fix in time. We’ve postponed that feature to a later version.)</p>
+
+<p>Changes since 5.1b1:</p>
+
+<p>The Clean Up command now works in the All Unread smart feed</p>
+<p>Sandboxing has been reverted to off</p>
+
+	]]></description>
+	<pubDate>Tue, 15 Sep 2020 17:50:00 -0700</pubDate>
+	<enclosure url="https://github.com/Ranchero-Software/NetNewsWire/releases/download/mac-5.1beta2/NetNewsWire5.1b2.zip" sparkle:version="3006" sparkle:shortVersionString="5.1b2" length="6561364" type="application/zip" />
+	<sparkle:minimumSystemVersion>10.15.0</sparkle:minimumSystemVersion>
+</item>
+
+<title>NetNewsWire 5.1b1</title>
 	<description><![CDATA[
 <p>Articles with non-ASCII URLs can now open in browser</p>
 <p>Adding feeds with non-ASCII URLs now works</p>
diff --git a/Appcasts/netnewswire-beta.xml b/Appcasts/netnewswire-beta.xml
index a8e718b3f..818e6512b 100755
--- a/Appcasts/netnewswire-beta.xml
+++ b/Appcasts/netnewswire-beta.xml
@@ -6,6 +6,26 @@
         <description>Most recent NetNewsWire changes with links to updates.</description>
         <language>en</language>
 
+<item>
+	<title>NetNewsWire 5.1b2</title>
+	<description><![CDATA[
+<p><b>Important note!</b> If you created an account using a previous 5.1 test build, <b>you will have to create it again.</b></p>
+
+<p>This is because we turned off sandboxing in this build, and sandboxing changes the location of your data.</p>
+
+<p>(We turned off sandboxing due to crashes we didn’t feel we could investigate and fix in time. We’ve postponed that feature to a later version.)</p>
+
+<p>Changes since 5.1b1:</p>
+
+<p>The Clean Up command now works in the All Unread smart feed</p>
+<p>Sandboxing has been reverted to off</p>
+
+	]]></description>
+	<pubDate>Tue, 15 Sep 2020 17:50:00 -0700</pubDate>
+	<enclosure url="https://github.com/Ranchero-Software/NetNewsWire/releases/download/mac-5.1beta2/NetNewsWire5.1b2.zip" sparkle:version="3006" sparkle:shortVersionString="5.1b2" length="6561364" type="application/zip" />
+	<sparkle:minimumSystemVersion>10.15.0</sparkle:minimumSystemVersion>
+</item>
+
 <item>
 	<title>NetNewsWire 5.1b1</title>
 	<description><![CDATA[