diff --git a/MANIFEST.in b/MANIFEST.in
index aa032d0..33cb0ea 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,6 +1,10 @@
 include License
 include README.rst
 recursive-include mail_editor/templates *
+recursive-include mail_editor *.html
+recursive-include mail_editor *.txt
+recursive-include mail_editor *.po
 recursive-include bin *
+recursive-include testapp *
 global-exclude __pycache__
 global-exclude *.py[co]
diff --git a/pyproject.toml b/pyproject.toml
index ea48b5f..b462e8f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "mail_editor"
-version = "0.3.6"
+version = "0.3.7"
 description = "A Django package for email template editing"
 authors = [
     {name = "Maykin Media", email = "support@maykinmedia.nl"}
@@ -68,6 +68,7 @@ release = [
 
 [tool.setuptools.packages.find]
 include = ["mail_editor*"]
+exclude = ["tests", "testapp"]
 namespaces = false
 
 [tool.isort]
@@ -82,7 +83,7 @@ testpaths = ["tests"]
 DJANGO_SETTINGS_MODULE = "testapp.settings"
 
 [tool.bumpversion]
-current_version = "0.3.6"
+current_version = "0.3.7"
 files = [
     {filename = "pyproject.toml"},
     {filename = "README.rst"},