diff --git a/docs/cookiecutter_input.json b/docs/cookiecutter_input.json
index 1cb2639cc80b529127084567e6e2727c532bea4c..71800e8e654aac2c3d4bf3d351288f3b3cd8cdb5 100644
--- a/docs/cookiecutter_input.json
+++ b/docs/cookiecutter_input.json
@@ -9,7 +9,7 @@
     "email": "dboe@ipp.mpg.de",
     "keywords": "tensors, tensor-fields, graphs, mesh, numpy, math",
     "package_name": "tfields",
-    "package_version": "0.3.8",
+    "package_version": "0.3.9",
     "pypi_username": "dboe",
     "remote_namespace": "dboe",
     "remote_provider": "gitlab.mpcdf.mpg.de",
diff --git a/setup.cfg b/setup.cfg
index 62645232853cd0c6a78201d255225228e58a71b9..bd3017bffe25d1157a42b9d35ffd5da40eacc634 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.8
+current_version = 0.3.9
 tag = True
 commit = True
 message = release-v{new_version}
diff --git a/setup.py b/setup.py
index 53d4d206f292fd05f2823df508fed012405c90e1..5546e59487e3beb5e621f90a5375f9289027feba 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,3 @@
 from setuptools import setup
 
-setup(version="0.3.8")
+setup(version="0.3.9")
diff --git a/tfields/__init__.py b/tfields/__init__.py
index b5efc55da6313f4afbccfbf24753a062a28e8d8f..e3c0971156ac82edd94660f9452bd1e405ab5e77 100644
--- a/tfields/__init__.py
+++ b/tfields/__init__.py
@@ -5,7 +5,7 @@ TODO: proper documentation, also in dough.
 
 __author__ = """Daniel Böckenhoff"""
 __email__ = "dboe@ipp.mpg.de"
-__version__ = "0.3.8"
+__version__ = "0.3.9"
 
 # methods:
 from tfields.core import dim, rank