diff --git a/README.md b/README.md
index 5dc93cc..d1e2f85 100644
--- a/README.md
+++ b/README.md
@@ -26,11 +26,19 @@ Add GOPATH to your PATH
 export PATH=$(go env GOPATH)/bin:$PATH
 ```
 
+# Supported images
+
+The supported images are jpeg and png from the sources.
+
+The extensions can be: jpg, jpeg, png.
+
+The case for extensions doesn't matter.
+
 # Usage
 
 ## Convert directory
 
-Convert every ".jpg" file found in the input directory:
+Convert every supported images file found in the input directory:
 
 ```
 go-comic-converter --profile KS --input ~/Download/MyComic
@@ -40,7 +48,7 @@ By default it will output: ~/Download/MyComic.epub
 
 ## Convert CBZ, ZIP, CBR, RAR, PDF
 
-Convert every ".jpg" file found in the input directory:
+Convert every supported images file found in the input directory:
 
 ```
 go-comic-converter --profile KS --input ~/Download/MyComic.[CBZ,ZIP,CBR,RAR,PDF]