diff --git a/README.md b/README.md
index 2f3f067..3673da1 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,10 @@ npm install
 npm run test
 ```
 
+## Known issues
+
+- Not yet compatible with all PBM files I have lying around
+
 ## Missing features
 
 - Color Cycling