diff --git a/src/api/apiErrors.js b/src/api/apiErrors.js
index 61d504eabb2..57d1efb5913 100644
--- a/src/api/apiErrors.js
+++ b/src/api/apiErrors.js
@@ -182,7 +182,7 @@ export const interpretApiResponse = (httpStatus: number, data: mixed): mixed =>
  */
 // This should lag a bit behind the threshold version for ServerCompatBanner
 // (kMinSupportedVersion), to give users time to see and act on the banner.
-export const kMinAllowedServerVersion: ZulipVersion = new ZulipVersion('5.0');
+export const kMinAllowedServerVersion: ZulipVersion = new ZulipVersion('7.0');
 
 /**
  * An error we throw in API bindings on finding a server is too old.
diff --git a/src/common/ServerCompatBanner.js b/src/common/ServerCompatBanner.js
index 036d3c6372a..f04e4cc3508 100644
--- a/src/common/ServerCompatBanner.js
+++ b/src/common/ServerCompatBanner.js
@@ -32,14 +32,14 @@ export const kServerSupportDocUrl: URL = new URL(
  * See also kMinAllowedServerVersion in apiErrors.js, for the version below
  * which we just refuse to connect.
  */
-export const kMinSupportedVersion: ZulipVersion = new ZulipVersion('7.0');
+export const kMinSupportedVersion: ZulipVersion = new ZulipVersion('8.0');
 
 /**
  * The next value we'll give to kMinSupportedVersion in the future.
  *
  * This should be the next major Zulip Server version after kMinSupportedVersion.
  */
-export const kNextMinSupportedVersion: ZulipVersion = new ZulipVersion('8.0');
+export const kNextMinSupportedVersion: ZulipVersion = new ZulipVersion('9.0');
 
 type Props = $ReadOnly<{||}>;