diff --git a/MANIFEST.in b/MANIFEST.in
index 71a8bf2f..083fb1ab 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,6 +4,7 @@ include setupbase.py
 
 include pytest.ini
 include screencast.gif
+include CONTRIBUTING.md
 
 # Documentation
 graft docs
diff --git a/setup.cfg b/setup.cfg
index 65facb02..0b022df6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -14,3 +14,4 @@ known_excludes =
     readthedocs.yml
     environment.yml
     .pytest_cache
+    .binder/*