diff --git a/typos.toml b/typos.toml
index 37a7a37a43e891661ec885d1be21ea2f3b364d67..b8dc55b8e53a066933a7c8b70bf521b663c16cba 100644
--- a/typos.toml
+++ b/typos.toml
@@ -63,6 +63,8 @@ extend-exclude = [
 
 [default]
 extend-ignore-re = [
+    # PNG is a file format, not a typo
+    "PNG",
     'cl\[ist]',
     '\[lan\]guage',
     '"ba"',