diff --git a/hydrolib/core/__init__.py b/hydrolib/core/__init__.py
index 493f7415d..260c070a8 100644
--- a/hydrolib/core/__init__.py
+++ b/hydrolib/core/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.3.1"
diff --git a/pyproject.toml b/pyproject.toml
index 3101ccef4..9e72e3577 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "hydrolib-core"
-version = "0.3.0"
+version = "0.3.1"
 description = "Python wrappers around D-HYDRO Suite."
 authors = ["Deltares"]
 license = "MIT"
@@ -50,7 +50,7 @@ ipykernel = "^6.15.0"
 
 [tool.commitizen]
 name = "cz_conventional_commits"
-version = "0.3.0"
+version = "0.3.1"
 tag_format = "$version"
 version_files = [
     "hydrolib/core/__init__.py",
diff --git a/tests/data/reference/dimr/test_serialize.xml b/tests/data/reference/dimr/test_serialize.xml
index 7c99896c2..751c23421 100644
--- a/tests/data/reference/dimr/test_serialize.xml
+++ b/tests/data/reference/dimr/test_serialize.xml
@@ -2,7 +2,7 @@
 <dimrConfig xmlns="http://schemas.deltares.nl/dimr" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://schemas.deltares.nl/dimr http://content.oss.deltares.nl/schemas/dimr-1.3.xsd">
   <documentation>
     <fileVersion>1.3</fileVersion>
-    <createdBy>hydrolib-core 0.3.0</createdBy>
+    <createdBy>hydrolib-core 0.3.1</createdBy>
     <creationDate>2020-03-17T10:02:49.4520672Z</creationDate>
   </documentation>
   <control>
diff --git a/tests/data/reference/model/test_dimr_model_save.xml b/tests/data/reference/model/test_dimr_model_save.xml
index 5b309af69..7cb94810f 100644
--- a/tests/data/reference/model/test_dimr_model_save.xml
+++ b/tests/data/reference/model/test_dimr_model_save.xml
@@ -2,7 +2,7 @@
 <dimrConfig xmlns="http://schemas.deltares.nl/dimr" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://schemas.deltares.nl/dimr http://content.oss.deltares.nl/schemas/dimr-1.3.xsd">
   <documentation>
     <fileVersion>1.3</fileVersion>
-    <createdBy>hydrolib-core 0.3.0</createdBy>
+    <createdBy>hydrolib-core 0.3.1</createdBy>
     <creationDate>2021-07-29T12:45:00</creationDate>
   </documentation>
   <control>