diff --git a/CHANGELOG.md b/CHANGELOG.md
index a75a9a43..09b4c15e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+v0.53a (May 8, 2021)
+--------------------
+
+The download URL for Z-Push has been revised becaue the old URL stopped working.
+
 v0.53 (April 12, 2021)
 ----------------------
 
diff --git a/README.md b/README.md
index fc9f5bb2..6477abad 100644
--- a/README.md
+++ b/README.md
@@ -99,7 +99,7 @@ Clone this repository and checkout the tag corresponding to the most recent rele
 
 	$ git clone https://github.com/mail-in-a-box/mailinabox
 	$ cd mailinabox
-	$ git checkout v0.53
+	$ git checkout v0.53a
 
 Begin the installation.
 
diff --git a/setup/bootstrap.sh b/setup/bootstrap.sh
index 7f6014b5..9d0ba82a 100644
--- a/setup/bootstrap.sh
+++ b/setup/bootstrap.sh
@@ -24,7 +24,7 @@ if [ -z "$TAG" ]; then
 		
 	elif [ "`lsb_release -d | sed 's/.*:\s*//' | sed 's/18\.04\.[0-9]/18.04/' `" == "Ubuntu 18.04 LTS" ]; then
 		# This machine is running Ubuntu 18.04.
-		TAG=v0.53
+		TAG=v0.53a
 
 	elif [ "`lsb_release -d | sed 's/.*:\s*//' | sed 's/14\.04\.[0-9]/14.04/' `" == "Ubuntu 14.04 LTS" ]; then
 		# This machine is running Ubuntu 14.04.
diff --git a/setup/zpush.sh b/setup/zpush.sh
index 1a84e86a..fa564188 100755
--- a/setup/zpush.sh
+++ b/setup/zpush.sh
@@ -23,7 +23,7 @@ phpenmod -v php imap
 
 # Copy Z-Push into place.
 VERSION=2.6.2
-TARGETHASH=4b312d64227ef887b24d9cc8f0ae17519586f6e2
+TARGETHASH=f0e8091a8030e5b851f5ba1f9f0e1a05b8762d80
 needs_update=0 #NODOC
 if [ ! -f /usr/local/lib/z-push/version ]; then
 	needs_update=1 #NODOC
@@ -33,12 +33,12 @@ elif [[ $VERSION != `cat /usr/local/lib/z-push/version` ]]; then
 fi
 if [ $needs_update == 1 ]; then
 	# Download
-	wget_verify "https://stash.z-hub.io/rest/api/latest/projects/ZP/repos/z-push/archive?at=refs%2Ftags%2F$VERSION&format=zip" $TARGETHASH /tmp/z-push.zip
+	wget_verify "https://github.com/Z-Hub/Z-Push/archive/refs/tags/$VERSION.zip" $TARGETHASH /tmp/z-push.zip
 
 	# Extract into place.
 	rm -rf /usr/local/lib/z-push /tmp/z-push
 	unzip -q /tmp/z-push.zip -d /tmp/z-push
-	mv /tmp/z-push/src /usr/local/lib/z-push
+	mv /tmp/z-push/*/src /usr/local/lib/z-push
 	rm -rf /tmp/z-push.zip /tmp/z-push
 
 	rm -f /usr/sbin/z-push-{admin,top}