diff --git a/resources/contributors.txt b/resources/contributors.txt
index 13e67ea9b..8eec179cd 100644
--- a/resources/contributors.txt
+++ b/resources/contributors.txt
@@ -6,8 +6,8 @@
 # Name | Link | Avatar (Loaded as a resource) | Title (description of work done).
 
 # Avatar should be located in avatars/ directory. Its size should be 128x128 (get it from https://github.com/username.png?size=128).
-# Make sure to reduce avatar's size as much as possible with tool like pngcrush or optipng and run ./generate_resources.py
-# Contributor is what we use for someone who has contributed in general (like sent a programming-related PR)
+# Make sure to reduce avatar's size as much as possible with tool like pngcrush or optipng (if the file is in png format) and run ./generate_resources.py
+# Contributor is what we use for someone who has contributed in general (like sent a programming-related PR).
 
 fourtf | https://fourtf.com | :/avatars/fourtf.png | Author, main developer
 pajlada | https://pajlada.se | :/avatars/pajlada.png | Collaborator, co-developer