diff --git a/docs/contact.md b/docs/contact.md
index 30f94822e..d99aa9dee 100644
--- a/docs/contact.md
+++ b/docs/contact.md
@@ -11,4 +11,4 @@ For more information:
 A Slack channel is available for the EESSI community (an invitation is required
 to join).
 
-![EESSI logo](img/logos/EESSI_logo_horizontal.png)
+![EESSI logo](img/logos/EESSI_logo_horizontal.jpg)
diff --git a/docs/img/logos/EESSI_logo_horizontal.jpg b/docs/img/logos/EESSI_logo_horizontal.jpg
new file mode 100644
index 000000000..e4a578c1c
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diff --git a/docs/img/logos/EESSI_logo_horizontal.png b/docs/img/logos/EESSI_logo_horizontal.png
deleted file mode 100644
index 2fd70bb9b..000000000
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diff --git a/docs/img/logos/EESSI_logo_horizontal_smaller.jpg b/docs/img/logos/EESSI_logo_horizontal_smaller.jpg
new file mode 100644
index 000000000..c9510f629
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diff --git a/docs/img/logos/EESSI_logo_horizontal_smaller.png b/docs/img/logos/EESSI_logo_horizontal_smaller.png
deleted file mode 100644
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diff --git a/docs/index.md b/docs/index.md
index 88f816007..76dc26b18 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -1,5 +1,5 @@
 <p align="center">
-  <img width="60%" src="img/logos/EESSI_logo_horizontal.png" alt="EESSI logo">
+  <img width="60%" src="img/logos/EESSI_logo_horizontal.jpg" alt="EESSI logo">
 </p>
 
 # Welcome to the EESSI project documentation!
diff --git a/docs/overview.md b/docs/overview.md
index 92a8eda0c..bb75c783d 100644
--- a/docs/overview.md
+++ b/docs/overview.md
@@ -1,6 +1,6 @@
 # Overview of the EESSI project
 
-![EESSI logo](img/logos/EESSI_logo_horizontal_smaller.png)
+![EESSI logo](img/logos/EESSI_logo_horizontal_smaller.jpg)
 
 ## Scope & Goals