diff --git a/Casks/thunderbird-de.rb b/Casks/thunderbird-de.rb
index 9d11c638d..f77d35279 100644
--- a/Casks/thunderbird-de.rb
+++ b/Casks/thunderbird-de.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-de' do
-  version '38.7.2'
-  sha256 '1a98369b731fc8d5767a954a102e56d3233aed3f11581ed09c9a4863aeb4e226'
+  version '45.0'
+  sha256 '75055d9b25b9e52a20d5290f2c31537cc949a76992279149f752100cc711e0ba'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=de"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-fr.rb b/Casks/thunderbird-fr.rb
index a6077ec7e..1ecb0448b 100644
--- a/Casks/thunderbird-fr.rb
+++ b/Casks/thunderbird-fr.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-fr' do
-  version '38.7.2'
-  sha256 '4cf9c47d06c343cd9f6b8b464912003caeea5e3fd258d44aba2c5b1478533e34'
+  version '45.0'
+  sha256 '51278d07fab68cadb9e1964c205c04981320252494497f41e64ad16f7cdb50bd'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=fr"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-gl.rb b/Casks/thunderbird-gl.rb
index 10dd40fb8..f2f624040 100644
--- a/Casks/thunderbird-gl.rb
+++ b/Casks/thunderbird-gl.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-gl' do
-  version '38.7.2'
-  sha256 '1b6a262e619a0ca69345b1e32d25ff6fb0b5bd64cfda48de513867fbf3de0d43'
+  version '45.0'
+  sha256 '70679ecba2557b51af471b3d5fb1f407f459424106ea75644a4dea2de3225645'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=gl"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-it.rb b/Casks/thunderbird-it.rb
index 06fe383b6..d24d01b86 100644
--- a/Casks/thunderbird-it.rb
+++ b/Casks/thunderbird-it.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-it' do
-  version '38.7.2'
-  sha256 'd693220c58d1bc0b87e41a9cad3de8bbcfcbaa725f609162cc83be9712e2505d'
+  version '45.0'
+  sha256 '6f0e334231a6d16aff38b6e666b9b484217726fec1478fd3ffdfdece44fe7a6b'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=it"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-ja.rb b/Casks/thunderbird-ja.rb
index 3f0512662..22503f230 100644
--- a/Casks/thunderbird-ja.rb
+++ b/Casks/thunderbird-ja.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-ja' do
-  version '38.7.2'
-  sha256 'f31e9ca02b1f40921ca05c9b096196395b5133b7020e9a62b853d4beb0e9d584'
+  version '45.0'
+  sha256 '82be7e177464ecb8e97fc492ef156fd9001be718d6ef9a153031b53b5c1a5172'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=ja-JP-mac"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-nl.rb b/Casks/thunderbird-nl.rb
index 5a73f66aa..9e97e8cad 100644
--- a/Casks/thunderbird-nl.rb
+++ b/Casks/thunderbird-nl.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-nl' do
-  version '38.7.2'
-  sha256 '3084b1ff6e0a2d1f90bebb13ea3c4e099306f0da0f8e39dcf64f546307d4431a'
+  version '45.0'
+  sha256 '0c5b7c797614d7d78d438e977c26b062c66f2e9cb96403d25a5fe48ee717afec'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=nl"
   name 'Mozilla Mozilla Thunderbird'
diff --git a/Casks/thunderbird-pt-br.rb b/Casks/thunderbird-pt-br.rb
index 0fa39359a..349bbc12d 100644
--- a/Casks/thunderbird-pt-br.rb
+++ b/Casks/thunderbird-pt-br.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-pt-br' do
-  version '38.7.2'
-  sha256 'f211c9a41624b9e631aa9c706c8603b501a3c5cb2ee8c9f6c4d98997ff4c6662'
+  version '45.0'
+  sha256 'a924fac4bf283f59ff57b13f7cd05c10fad7c8529332d17c7c220fbf3e15ec9c'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=pt-BR"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-ru.rb b/Casks/thunderbird-ru.rb
index 3b05c9a3f..3fa089ed6 100644
--- a/Casks/thunderbird-ru.rb
+++ b/Casks/thunderbird-ru.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-ru' do
-  version '38.7.2'
-  sha256 'cd745b1962fec89e84ba9e28d48e2e90ac0822a94c7059dcf99acf259a30783d'
+  version '45.0'
+  sha256 '4d37392311966dde2d2f11a4c7e883ed89a8deed4de2f9b7a2ca1b61ecf21d0e'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=ru"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-uk.rb b/Casks/thunderbird-uk.rb
index ac54ca97c..6d78894fe 100644
--- a/Casks/thunderbird-uk.rb
+++ b/Casks/thunderbird-uk.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-uk' do
-  version '38.7.2'
-  sha256 '9f1d23b79c379fb3b7ab181db1762fb3a0ede2b3209ab4bd30ca81cce03de069'
+  version '45.0'
+  sha256 'f0f53bf3661d000b26fdac398f47ab81febf64d1c1860810bf8fcc3918ce1a92'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=uk"
   name 'Mozilla Thunderbird'
diff --git a/Casks/thunderbird-zh-cn.rb b/Casks/thunderbird-zh-cn.rb
index 59bd3d49d..39a8ce463 100644
--- a/Casks/thunderbird-zh-cn.rb
+++ b/Casks/thunderbird-zh-cn.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-zh-cn' do
-  version '38.7.2'
-  sha256 'f6856f648afa3b2f867c050c7fd845833562747fb9dc079707866f8991a75313'
+  version '45.0'
+  sha256 '1a8bd2457d9590b877c8636c48b1dd6308def068e786765e9601a8e97bb357b4'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=zh-CN"
   name 'Mozilla Thunderbird'