diff --git a/requirements.txt b/requirements.txt
index a9e9258f01f2a42d3fc51909951bcb9304bb6719..5dd5955e9786fe72a42f1a5fc7be3ba06f81eeea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ bob.core
 bob.io.base
 bob.learn.activation
 bob.math
-bob.learn.linear
+bob.learn.linear==2.0.6
 bob.sp
 bob.learn.em
 bob.measure