diff --git a/requirements.txt b/requirements.txt
index 762763a..3f4e57b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ rbapy
 scipy
 pandas
 numpy
-sbtab>=1.0.6
+sbtab==1.0.6
 python-libsbml
 jxmlease
 swiglpk