Update README.md

README.md

@@ -8,7 +8,7 @@ Install directly from [here on github](https://github.com/ankidroid/Anki-Android
 automatically by installing via an app store:
 
 <a href="https://play.google.com/store/apps/details?id=com.ichi2.anki&utm_source=global_co&utm_medium=prtnr&utm_content=Mar2515&utm_campaign=PartBadge&pcampaignid=MKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1"><img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/images/generic/en-play-badge.png" height="50px"/></a>
-<a href="https://f-droid.org/repository/browse/?fdid=com.ichi2.anki"><img alt="F-Droid" src="https://guardianproject.info/wp-content/uploads/2014/07/logo-fdroid.png" height="50px"/></a>
+<a href="https://f-droid.org/repository/browse/?fdid=com.ichi2.anki"><img alt="F-Droid" src="https://upload.wikimedia.org/wikipedia/commons/0/0d/Get_it_on_F-Droid.svg" height="50px"/></a>
 
 Help
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