diff --git a/MANIFEST.in b/MANIFEST.in
index 94a745f67..478c9f4d7 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,8 +1,12 @@
+include CODE_OF_CONDUCT.md
 include README.md
 include LICENSE
-include environment_python_3_5.yml
-include environment_python_3_6.yml
+include CHANGES.rst
+include environment_python_3_7.yml
+include environment_python_3_8.yml
 include setup.py
+include requirements.txt
+include rtd_requirements.txt
 include jwql/example_config.json
 
 recursive-include notebooks *
@@ -10,4 +14,4 @@ recursive-include style_guide *
 recursive-include typing_demo *
 recursive-include jwql/database/monitor_table_definitions *.txt
 
-exclude *.pyc
\ No newline at end of file
+exclude *.pyc