diff --git a/Casks/thunderbird-de.rb b/Casks/thunderbird-de.rb
index e90eeee00..35e493726 100644
--- a/Casks/thunderbird-de.rb
+++ b/Casks/thunderbird-de.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-de' do
-  version '38.5.0'
-  sha256 'c56d0a1c714462bbb26f864e834f3633ee3c61c5e89cdac83d8747d396b96a50'
+  version '38.5.1'
+  sha256 '2d9bea4897507d1d7c2a7dd1b4d3921e540abfaf62bbbe0e75545ecb28aec653'
 
   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 4f9536b35..897453079 100644
--- a/Casks/thunderbird-fr.rb
+++ b/Casks/thunderbird-fr.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-fr' do
-  version '38.5.0'
-  sha256 '5680de795144e5751547c0e341c8b7da350c445383645aefea38b7d97a0b85db'
+  version '38.5.1'
+  sha256 'dba6d6859fca6e08ccf535323881c17c42ddb39b602c6e615a5769091dd69c5e'
 
   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 f8a24bfe2..f751b96aa 100644
--- a/Casks/thunderbird-gl.rb
+++ b/Casks/thunderbird-gl.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-gl' do
-  version '38.5.0'
-  sha256 '6c0aecce31ea1a2ff20c8e2a6a975e09ca45106c56286a7d7ca3e3a645e64c66'
+  version '38.5.1'
+  sha256 '2f0f7b6f16b9819697c6a2d08700fc955e430d82cbfddff009262f81f1ada9e5'
 
   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 7017aa957..93537f0fd 100644
--- a/Casks/thunderbird-it.rb
+++ b/Casks/thunderbird-it.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-it' do
-  version '38.5.0'
-  sha256 'b78508f3a892b6a9c24cf819ae05fa981e23d8887e7bcf1ea57cda1a8ddcd62d'
+  version '38.5.1'
+  sha256 'd164a6da1dfcbdb33930a40be733e74d739fb5c7561916f919ee05b1da84ec3d'
 
   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 dedeac4b9..8480a13ea 100644
--- a/Casks/thunderbird-ja.rb
+++ b/Casks/thunderbird-ja.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-ja' do
-  version '38.5.0'
-  sha256 '49b7fb8b3342124bc2bc4c8b4ca5d2467b23c8d5157b08e06e044362de7f701a'
+  version '38.5.1'
+  sha256 'b6fb3d216f44503f086303076241ff78369d9faeef650c40d8ee88f92d155dbc'
 
   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 7d18a9de2..f4fe1a00c 100644
--- a/Casks/thunderbird-nl.rb
+++ b/Casks/thunderbird-nl.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-nl' do
-  version '38.5.0'
-  sha256 '2512ae26df8c0ad87fc9961ec1a29bf8935b1d25460784bc6c8f99a96fe88c43'
+  version '38.5.1'
+  sha256 '6dd32d1b6963d9dfcb1eea932135830906e8f2687bf1771fcf53c740d7bcf143'
 
   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 5a193b525..0b99a94f0 100644
--- a/Casks/thunderbird-pt-br.rb
+++ b/Casks/thunderbird-pt-br.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-pt-br' do
-  version '38.5.0'
-  sha256 'c6d4ac633d66e3e30f5efcb51bd9898d78f203704898b0a2a1c474316215a638'
+  version '38.5.1'
+  sha256 'd2bcd99b8af9243429011287df6fa3abeffbbcde7252068ce620dd089650ad07'
 
   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 8038a32b6..8d6cae977 100644
--- a/Casks/thunderbird-ru.rb
+++ b/Casks/thunderbird-ru.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-ru' do
-  version '38.5.0'
-  sha256 'f2ec8fc356e01b31d6930f27c662c80b4c3533d037c69b1a1708fc3923e4fa28'
+  version '38.5.1'
+  sha256 '1cd6544c9a475f0ad5c4949e67568d2801cdba7b58478001c6d8e96b27d60cec'
 
   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 765f65769..e22978d5e 100644
--- a/Casks/thunderbird-uk.rb
+++ b/Casks/thunderbird-uk.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-uk' do
-  version '38.5.0'
-  sha256 '3da94688e8ad135476f4152e536e6ba8bf407b85ae7ba14809f246daab0041f3'
+  version '38.5.1'
+  sha256 'af35281921fed9b6ca3964106d72c30269f52644101c5e8c8fc855cf61d6aba6'
 
   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 ec74c9f1e..13a13bf0f 100644
--- a/Casks/thunderbird-zh-cn.rb
+++ b/Casks/thunderbird-zh-cn.rb
@@ -1,6 +1,6 @@
 cask 'thunderbird-zh-cn' do
-  version '38.5.0'
-  sha256 '99b738399d8e82a808258b6397cbaa7a2a1a25e1d417cadb4fd95ba3f4cc26b1'
+  version '38.5.1'
+  sha256 '8e1869ce36f541c3f17bd66bdc64bb6f0302961702091d70c147d0450fc371a1'
 
   url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=zh-CN"
   name 'Mozilla Thunderbird'