diff --git a/identify/extensions.py b/identify/extensions.py
index 8da71a7..5d49d87 100644
--- a/identify/extensions.py
+++ b/identify/extensions.py
@@ -194,6 +194,7 @@
     'php4': {'text', 'php'},
     'php5': {'text', 'php'},
     'phtml': {'text', 'php'},
+    'piskel': {'text', 'piskel', 'json'},
     'pl': {'text', 'perl'},
     'plantuml': {'text', 'plantuml'},
     'pm': {'text', 'perl'},