diff --git a/Readme.md b/Readme.md
index 5592024..b4efad1 100644
--- a/Readme.md
+++ b/Readme.md
@@ -104,4 +104,13 @@ GET fda/{trackingId}/done
 
 # Notes
 ## Upgrade FDA 1.x to 2.x
-In existing fda.properties file the following property need to be added: `ch.psi.fda.aq.data.dir=../data`
\ No newline at end of file
+In existing fda.properties file the following property need to be added: `ch.psi.fda.aq.data.dir=../data`
+
+## Upgrade FDA 2.6.1
+There are 2 new properties for crlogic:
+
+```
+ch.psi.fda.aq.crlogic.ioc=X05LA-VME-ES2
+ch.psi.fda.aq.crlogic.prefix=X05LA-ES2-CRL
+```
+