diff --git a/keyserver/src/push/rescind.js b/keyserver/src/push/rescind.js
--- a/keyserver/src/push/rescind.js
+++ b/keyserver/src/push/rescind.js
@@ -72,19 +72,8 @@
         });
         receivingDeviceTokens.push(...delivery.iosDeviceTokens);
       } else if (delivery.androidID) {
-        // Old Android
-        const notification = prepareAndroidNotification(
-          row.collapse_key ? row.collapse_key : id,
-          row.unread_count,
-          threadID,
-          null,
-        );
-        deliveryPromises[id] = fcmPush({
-          notification,
-          deviceTokens: delivery.androidDeviceTokens,
-          codeVersion: null,
-        });
-        receivingDeviceTokens.push(...delivery.androidDeviceTokens);
+        // Dropped support for old Android
+        continue;
       } else if (delivery.deviceType === 'ios') {
         // New iOS
         const { iosID, deviceTokens, codeVersion } = delivery;
@@ -107,7 +96,6 @@
           row.collapse_key ? row.collapse_key : id,
           row.unread_count,
           threadID,
-          codeVersion,
         );
         deliveryPromises[id] = fcmPush({
           notification,
@@ -202,19 +190,7 @@
   notifID: string,
   unreadCount: number,
   threadID: string,
-  codeVersion: ?number,
 ): Object {
-  if (!codeVersion || codeVersion < 31) {
-    return {
-      data: {
-        badge: unreadCount.toString(),
-        custom_notification: JSON.stringify({
-          rescind: 'true',
-          notifID,
-        }),
-      },
-    };
-  }
   return {
     data: {
       badge: unreadCount.toString(),
diff --git a/keyserver/src/push/send.js b/keyserver/src/push/send.js
--- a/keyserver/src/push/send.js
+++ b/keyserver/src/push/send.js
@@ -547,26 +547,7 @@
         messageInfos,
       },
     };
-  } else if (codeVersion < 31) {
-    return {
-      data: {
-        badge: unreadCount.toString(),
-        custom_notification: JSON.stringify({
-          channel: 'default',
-          body: merged,
-          badgeCount: unreadCount,
-          id: notifID,
-          priority: 'high',
-          sound: 'default',
-          icon: 'notif_icon',
-          threadID: threadInfo.id,
-          messageInfos,
-          click_action: 'fcm.ACTION.HELLO',
-        }),
-      },
-    };
   }
-
   return {
     data: {
       badge: unreadCount.toString(),
diff --git a/keyserver/src/session/version.js b/keyserver/src/session/version.js
--- a/keyserver/src/session/version.js
+++ b/keyserver/src/session/version.js
@@ -10,7 +10,7 @@
   viewer: Viewer,
   platformDetails: ?PlatformDetails,
 ) {
-  if (hasMinCodeVersion(platformDetails, 24)) {
+  if (hasMinCodeVersion(platformDetails, 32)) {
     return;
   }
   const error = new ServerError('client_version_unsupported');