diff --git a/odte/_version.py b/odte/_version.py
index e19434e..334b899 100644
--- a/odte/_version.py
+++ b/odte/_version.py
@@ -1 +1 @@
-__version__ = "0.3.3"
+__version__ = "0.3.4"
diff --git a/requirements.txt b/requirements.txt
index 238c39c..a8e5409 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-stree>1.2.2
\ No newline at end of file
+stree>=1.3.1