diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index 66e6167..b5844b0 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Mon Apr 17 12:43:48 UTC 2017 - wr@rosenauer.org
+
+- update to Thunderbird 52.0.1
+  * Clicking on a link in an email may not open this link in the
+    external browser
+  * addon blocklist updates
+- enable ALSA for systems w/o PA
+
 -------------------------------------------------------------------
 Sat Mar 18 21:06:01 UTC 2017 - wr@rosenauer.org
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index af51da9..5327fe0 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -17,9 +17,9 @@
 #
 
 
-%define mainversion 52.0
+%define mainversion 52.0.1
 %define update_channel release
-%define releasedate 201703220000
+%define releasedate 201704130000
 
 %bcond_without mozilla_tb_kde4
 %bcond_with    mozilla_tb_valgrind
@@ -258,6 +258,7 @@ ac_add_options --libdir=%{progdir}
 ac_add_options --includedir=%{_includedir}
 ac_add_options --disable-tests
 ac_add_options --disable-debug
+ac_add_options --enable-alsa
 ac_add_options --enable-optimize
 %if 0%{?mozilla_use_gtk3}
 ac_add_options --enable-default-toolkit=cairo-gtk3
diff --git a/compare-locales.tar.xz b/compare-locales.tar.xz
index e517b1f..431eba8 100644
--- a/compare-locales.tar.xz
+++ b/compare-locales.tar.xz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:e33b975a7e8951a5c400529ef9db970f05c36c52395046888949784145005a3b
-size 28360
+oid sha256:d654df28ca39d147a284543405b8d04eff91321a4f4c4c9f822500408f37c555
+size 28368
diff --git a/create-tar.sh b/create-tar.sh
index c365f7c..19c47aa 100644
--- a/create-tar.sh
+++ b/create-tar.sh
@@ -2,8 +2,8 @@
 
 CHANNEL="esr52"
 BRANCH="releases/comm-$CHANNEL"
-RELEASE_TAG="37a1e30b18a24b27e75145fd19c8ffe566e384b1"
-VERSION="52.0"
+RELEASE_TAG="THUNDERBIRD_52_0_1_RELEASE"
+VERSION="52.0.1"
 
 echo "cloning $BRANCH..."
 hg clone http://hg.mozilla.org/$BRANCH thunderbird
diff --git a/l10n-52.0.1.tar.xz b/l10n-52.0.1.tar.xz
new file mode 100644
index 0000000..a55545e
--- /dev/null
+++ b/l10n-52.0.1.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:71db66b7a52aa620bf1c24108e39dafbd24f4eded8499921b67379e265fe59a4
+size 26212680
diff --git a/l10n-52.0.tar.xz b/l10n-52.0.tar.xz
deleted file mode 100644
index 506eb11..0000000
--- a/l10n-52.0.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e4b65cc95a1e49f5a75397a30870ac7a142efea84b8a4440341a589389a41a64
-size 26114508
diff --git a/thunderbird-52.0-source.tar.xz b/thunderbird-52.0-source.tar.xz
deleted file mode 100644
index 13ddc00..0000000
--- a/thunderbird-52.0-source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f5176f11035916d5216ce91b86984b0f65319ef2d0c62fc08d056d6ae29484d5
-size 240136332
diff --git a/thunderbird-52.0.1-source.tar.xz b/thunderbird-52.0.1-source.tar.xz
new file mode 100644
index 0000000..b5aed9f
--- /dev/null
+++ b/thunderbird-52.0.1-source.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5eb26aa1727c9dfa96912b006604263feac590118ff13b7743275a098e28848b
+size 240207288