diff --git a/README.Rmd b/README.Rmd
index f27582c..f03b6b5 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -121,7 +121,7 @@ fba(mod)
 
 ## Notes
 
-- *cobrar* exports SBML files level 3 version 2 with `fbc` version 3 and `groups` version 1. 
+- *cobrar* exports SBML files level 3 version 2 with `fbc` version 2 and `groups` version 1. 
 - Group assignments are only supported for reactions.
 - GLPK is the default solver and is required to build the package. A plugin for IBM's ILOG CPLEX is available [here (cobrarCPLEX)](https://github.com/Waschina/cobrarCPLEX).
 - *Multiple objectives*. The SBML standard with its `fbc` extension allows to specify more than one objective (class `ListOfObjectives`). However, *cobrar* can only handle one current objective function per model, which is defined as an objective coefficient vector in slot `obj_coef` of an object of class `modelorg`. Note that when reading SBML models, *cobrar* will only use the objective, which is defined as `activeObjective` in the SBML file, or the first objective if no active objective is defined.
diff --git a/README.md b/README.md
index 4baadd9..b180b29 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,7 @@ fba(mod)
 
 ## Notes
 
-- *cobrar* exports SBML files level 3 version 2 with `fbc` version 3 and
+- *cobrar* exports SBML files level 3 version 2 with `fbc` version 2 and
   `groups` version 1.
 - Group assignments are only supported for reactions.
 - GLPK is the default solver and is required to build the package. A