diff --git a/api/src/shipit_api/common/config.py b/api/src/shipit_api/common/config.py
index ae4ec2fd0..f8fef7446 100644
--- a/api/src/shipit_api/common/config.py
+++ b/api/src/shipit_api/common/config.py
@@ -78,7 +78,7 @@
 
 # Thunderbird configs
 LATEST_THUNDERBIRD_ALPHA_VERSION = "54.0a2"
-LATEST_THUNDERBIRD_NIGHTLY_VERSION = "127.0a1"
+LATEST_THUNDERBIRD_NIGHTLY_VERSION = "128.0a1"
 
 THUNDERBIRD_RELEASE_BRANCH = "releases/comm-release"
 THUNDERBIRD_OLD_RELEASE_BRANCH = "releases/comm-esr115"