diff --git a/slides/223015b/01-grundlagen-text-audio.md b/slides/223015b/01-grundlagen-text-audio.md
index f107962..6ac2b71 100644
--- a/slides/223015b/01-grundlagen-text-audio.md
+++ b/slides/223015b/01-grundlagen-text-audio.md
@@ -1106,10 +1106,10 @@ Prognose 2028: 394 ZB
 
 
 <!-- _header: '' -->
-<!-- _footer: 'Floridi, L.: The forth Revolution' -->
+<!-- _footer: '' -->
 
 
-![bg fit](./assets/growth of big data.png)
+![bg fit](./assets/growth-of-big-data.png)
 
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diff --git a/slides/223015b/assets/growth of big data.png b/slides/223015b/assets/growth-of-big-data.png
similarity index 100%
rename from slides/223015b/assets/growth of big data.png
rename to slides/223015b/assets/growth-of-big-data.png