diff --git a/identify/extensions.py b/identify/extensions.py
index d79f5b4..4475a41 100644
--- a/identify/extensions.py
+++ b/identify/extensions.py
@@ -91,6 +91,7 @@ EXTENSIONS = {
     'kt': {'text', 'kotlin'},
     'less': {'text', 'less'},
     'lhs': {'text', 'literate-haskell'},
+    'libsonnet': {'text', 'jsonnet'},
     'lidr': {'text', 'idris'},
     'lua': {'text', 'lua'},
     'm': {'text', 'c', 'objective-c'},
diff --git a/setup.cfg b/setup.cfg
index 3d13108..ea0b137 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = identify
-version = 1.4.28
+version = 1.4.29
 description = File identification library for Python
 long_description = file: README.md
 long_description_content_type = text/markdown