diff --git a/SCHEMATA/changelog.md b/SCHEMATA/changelog.md
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--- a/SCHEMATA/changelog.md
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@@ -1,5 +1,9 @@
 # Changelog - Schema
 
+- From version 0.2.2 to 0.2.3 (2024-03-12):
+
+ - A new data entry `category` added as a string with following possible values: `digital_preservation`, `tools_and_analysis`,  `infrastructure`, `other`
+
 - From version 0.2.1 to 0.2.2 (2023-12-14):
 
   - The Boolean value `maintained` has been added to the `project` section with the goal to differentiate between the founding periods and the actual lifespan of the projects.