diff --git a/appdefs.xml b/appdefs.xml
index 376d688..ec16757 100644
--- a/appdefs.xml
+++ b/appdefs.xml
@@ -109,6 +109,11 @@ Where:
     </documentation>
     <!-- Changelog of the application. -->
     <history>
+      <release>
+        <version>1.8.1</version>
+        <date>2020-05-21</date>
+        <change>Upgraded Nginx Proxy Manager to version 2.2.4.</change>
+      </release>
       <release>
         <version>1.8.0</version>
         <date>2020-04-15</date>