diff --git a/opteryx/version.py b/opteryx/version.py
index bf3be4910..e52a156d7 100644
--- a/opteryx/version.py
+++ b/opteryx/version.py
@@ -16,4 +16,4 @@
 2) we can import it in setup.py for the same reason
 """
 
-__version__ = "0.0.3-beta.10"
+__version__ = "0.0.3-beta.11"
diff --git a/setup.py b/setup.py
index c07116917..ada2d14a7 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,7 @@
     Extension(
         name="counting_tree",
         sources=["opteryx/sketches/counting_tree.pyx"],
+        include_dirs=["opteryx/sketches"],
     ),
 ]