diff --git a/CHANGELOG.md b/CHANGELOG.md
index b81663d7e..57162d864 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 == Changelog ===
 
+= 5.1.0 =
+* Upgrade Matomo core to version 5.1.0 (changes: https://matomo.org/changelog/matomo-5-1-0/).
+* Bug fix: sending emails with attachments failed on WordPress 5.
+* Bug fix: fix rare critical error when PEAR library is used in a certain way.
+* Fix deprecation notice in marketplace setup wizard.
+
 = 5.0.8 =
 * Improve PHP CLI diagnostic change: avoid reporting issues when a hosting provider does not support CLI archiving.
 
diff --git a/matomo.php b/matomo.php
index 087565c08..f6586948d 100644
--- a/matomo.php
+++ b/matomo.php
@@ -4,7 +4,7 @@
  * Description: Privacy friendly, GDPR compliant and self-hosted. Matomo is the #1 Google Analytics alternative that gives you control of your data. Free and secure.
  * Author: Matomo
  * Author URI: https://matomo.org
- * Version: 5.0.8
+ * Version: 5.1.0
  * Domain Path: /languages
  * WC requires at least: 2.4.0
  * WC tested up to: 8.8.3
diff --git a/readme.txt b/readme.txt
index fb63144c1..de71054a5 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: matomoteam
 Tags: matomo,analytics,statistics,stats,ecommerce
 Requires at least: 4.8
 Tested up to: 6.5.4
-Stable tag: 5.0.8
+Stable tag: 5.1.0
 Requires PHP: 7.2.5
 License: GPLv3 or later
 License URI: https://www.gnu.org/licenses/gpl-3.0.html
diff --git a/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.7.2.trunk.png b/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.7.2.trunk.png
index c3342667f..05e2277b4 100644
--- a/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.7.2.trunk.png
+++ b/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.7.2.trunk.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f5ab70d6fd81cff70b63856498f0b02fef31fcda3c0d814662c161e518be0bd0
-size 959984
+oid sha256:ff17c20cc5011751a232afd3d760512da4fd59929b8c8269e86048bcc4befee0
+size 961265
diff --git a/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.8.1.trunk.png b/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.8.1.trunk.png
index f83eded26..fd8ee8834 100644
--- a/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.8.1.trunk.png
+++ b/tests/e2e/baseline/desktop_firefox/mwp-admin.diagnostics.system-report.8.1.trunk.png
@@ -1,3 +1,3 @@
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-oid sha256:91452427607d201a9b32d94072aa039ca812ac628d4ebc9f72a0c19c22559aa5
-size 962289
+oid sha256:4d264e06fdb6203f2b466b290716c4677bc94ffb985f439deff07e25395b6bad
+size 962220