--- a/mozilla/release-thunderbird-comm-esr45.py
+++ b/mozilla/release-thunderbird-comm-esr45.py
@@ -18,51 +18,57 @@ releaseConfig['messagePrefix']       = '
 # Basic product configuration
 #  Names for the product/files
 releaseConfig['productName']         = 'thunderbird'
 releaseConfig['stage_product']       = 'thunderbird'
 releaseConfig['appName']             = 'mail'
 releaseConfig['relbranchPrefix']     = 'THUNDERBIRD'
 releaseConfig['mozilla_srcdir']      = 'mozilla'
 #  Current version info
-releaseConfig['version']             = '45.3.0'
-releaseConfig['appVersion']          = '45.3.0'
+releaseConfig['version']             = '45.4.0'
+releaseConfig['appVersion']          = '45.4.0'
 releaseConfig['milestone']           = releaseConfig['appVersion']
 releaseConfig['buildNumber']         = 1
-releaseConfig['baseTag']             = 'THUNDERBIRD_45_3_0'
+releaseConfig['baseTag']             = 'THUNDERBIRD_45_4_0'
 releaseConfig['partialUpdates']      = {
 
+    '45.3.0': {
+        'appVersion': '45.3.0',
+        'buildNumber': 1,
+        'baseTag': 'THUNDERBIRD_45_3_0',
+    },
+
     '45.2.0': {
         'appVersion': '45.2.0',
         'buildNumber': 1,
         'baseTag': 'THUNDERBIRD_45_2_0',
     },
 
 }
 #  Next (nightly) version info
 releaseConfig['nextAppVersion']      = releaseConfig['appVersion']
 releaseConfig['nextMilestone']       = releaseConfig['milestone']
 #  Repository configuration, for tagging
 releaseConfig['sourceRepositories']  = {
     'comm': {
         'name': 'comm-esr45',
         'path': 'releases/comm-esr45',
-        'revision': 'd273d978917a',
+        'revision': 'fffc59d887b8',
         'relbranch': None,
         'bumpFiles': {
             'mail/config/version.txt': {
                 'version': releaseConfig['appVersion'],
                 'nextVersion': releaseConfig['nextAppVersion']
             },
         }
     },
     'mozilla': {
         'name': 'mozilla-esr45',
         'path': 'releases/mozilla-esr45',
-        'revision': '51dd4d5ecb90',
+        'revision': 'e31ecf91eeb2',
         'relbranch': None,
         'bumpFiles': {
             'config/milestone.txt': {
                 'version': releaseConfig['milestone'],
                 'nextVersion': releaseConfig['nextMilestone']
             },
         }
     }