diff --git a/.docs/images/architecture.drawio b/.docs/images/architecture.drawio
index 2559a653790f7a5de96948d00394017982d8073a..588ede83e27578b9cb42d9b10551609333fae6d3 100644
--- a/.docs/images/architecture.drawio
+++ b/.docs/images/architecture.drawio
@@ -975,113 +975,95 @@
</mxGraphModel>
</diagram>
<diagram id="DNBJDzVGt1bZ_wE9aRrb" name="Authentication (TU)">
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</mxCell>
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</mxCell>
- <mxCell id="6Mvu0cpha-60HerBRlcp-4" value="<a href="https://test.dbrepo.tuwien.ac.at/api/auth/realms/dbrepo/broker/saml/endpoint/descriptor">XML<br>Metadata</a>" style="shape=note;whiteSpace=wrap;html=1;backgroundOutline=1;darkOpacity=0.05;size=17;fillColor=#f5f5f5;fontColor=#333333;strokeColor=#666666;" parent="1" vertex="1">
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diff --git a/.docs/installation.md b/.docs/installation.md
index ae807e69d0d980baa972e3010f7a5c0005657a8d..79530f31ee8ee69ffdab2c0078921948229a6db2 100644
--- a/.docs/installation.md
+++ b/.docs/installation.md
@@ -22,13 +22,10 @@ curl -sSL https://gitlab.phaidra.org/fair-data-austria-db-repository/fda-service
## Requirements
-We only support the Debian 12 operating system officially. In theory, any DEB-based operating system (e.g. Ubuntu)
-should be compatible. Any modern hardware suffices, we recommend a dedicated virtual machine with the following
-settings.
+We recommend a dedicated virtual machine with the following system requirements:
- min. 8 vCPU cores
-- min. 8GB free RAM memory
-- min. 200GB free SSD storage
+- min. 20GB free RAM memory
Since DBRepo is intended to be a publicly available repository, an optional fixed/static IP-address with optional
SSL/TLS certificate is recommended. Follow the [secure installation](#secure-installation) guide.