diff --git a/identify/extensions.py b/identify/extensions.py
index 3f09b89..4710ac6 100644
--- a/identify/extensions.py
+++ b/identify/extensions.py
@@ -68,6 +68,7 @@
     'idr': {'text', 'idris'},
     'inc': {'text', 'inc'},
     'ini': {'text', 'ini'},
+    'ipynb': {'text', 'jupyter'},
     'j2': {'text', 'jinja'},
     'jade': {'text', 'jade'},
     'jar': {'binary', 'zip', 'jar'},
diff --git a/setup.cfg b/setup.cfg
index ed1aba7..ee16c49 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = identify
-version = 1.4.19
+version = 1.4.20
 description = File identification library for Python
 long_description = file: README.md
 long_description_content_type = text/markdown