diff --git a/readme.md b/readme.md
index f367119..37595cd 100644
--- a/readme.md
+++ b/readme.md
@@ -17,6 +17,16 @@ in a [separate repository](https://egit.irs.uni-stuttgart.de/zietzm/Helmholtz_Te
 Alternatively use the `Helmholtz Cage Control.exe` from the `Release` folder in this repository.
 
 ## Users Guide
-For detailed instructions please refer to `Users Guide.pdf`.
+For detailed instructions please refer to the main documentation PDF in the `Documentation` folder.
 
-##
+## Changelog
+### V 1.0 (02.03.2021)
+Initial Version
+
+### V 1.1 (10.03.2021)
+- updated UI with user feedback
+
+### V 1.15 (27.03.2021)
+- added documentation
+- tweaks and ToDo's after testing with all devices connected (communication with PSUs is too slow)
+- UI tweaks to better fit smaller display of cleanroom PC
\ No newline at end of file