diff --git a/doc/index.adoc b/doc/index.adoc
index 03acf0d..4eb9a72 100644
--- a/doc/index.adoc
+++ b/doc/index.adoc
@@ -36,5 +36,5 @@ Infrastructure for the Arts and Humanities consortium. Funding has been
 provided by the German Federal Ministry for Research and Education
 (BMBF) under the identifier 01UG1110J.
 
-image:content/dariah-de_logo[DARIAH-DE]
-image:content/bmbf_logo[BMBF]
+image:content/dariah-de_logo.png[DARIAH-DE]
+image:content/bmbf_logo.png[BMBF]