diff --git a/data/org.gramps_project.Gramps.metainfo.xml.in b/data/org.gramps_project.Gramps.metainfo.xml.in
index 059abe7b9b1..3829eaa6bda 100644
--- a/data/org.gramps_project.Gramps.metainfo.xml.in
+++ b/data/org.gramps_project.Gramps.metainfo.xml.in
@@ -58,6 +58,7 @@
   <content_rating type="oars-1.1" />
 
   <releases>
+    <release date="2024-03-24" version="5.2.1" />
     <release date="2024-02-23" version="5.2.0" />
     <release date="2023-06-29" version="5.1.6" />
     <release date="2022-02-06" version="5.1.5" />
diff --git a/gramps/version.py b/gramps/version.py
index ccc3d51b92c..66e329866b8 100644
--- a/gramps/version.py
+++ b/gramps/version.py
@@ -18,7 +18,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 #
 
-DEV_VERSION = True
+DEV_VERSION = False
 VERSION_TUPLE = (5, 2, 1)
 VERSION_QUALIFIER = ""
 VERSION = ".".join(map(str, VERSION_TUPLE)) + VERSION_QUALIFIER