diff --git a/eyelign/eyelign.py b/eyelign/eyelign.py
index 88514bd..a4d4086 100644
--- a/eyelign/eyelign.py
+++ b/eyelign/eyelign.py
@@ -10,7 +10,7 @@
 
 class Eyelign:
     CACHE_FILENAME = ".eyelign"
-    SUPPORTED_INPUT_EXTENSIONS = ("jpg", "jpeg")
+    SUPPORTED_INPUT_EXTENSIONS = ("jpg", "jpeg", "png")
 
     def __init__(
         self,