diff --git a/Makefile b/Makefile
index 245ff44a..1ebd8e7c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 SUBDIRS=emblems kali-logos xfce-panel-profiles
-DESKTOP_BACKGROUND=kali-ferrofluid
-LOGIN_BACKGROUND=kali-aqua
+DESKTOP_BACKGROUND=kali-ferrofluid.jpg
+LOGIN_BACKGROUND=kali-aqua.jpg
 
 build:
 	bin/update-default-backgrounds $(DESKTOP_BACKGROUND) $(LOGIN_BACKGROUND)
diff --git a/bin/update-default-backgrounds b/bin/update-default-backgrounds
index b83a2cc0..55b2cb79 100755
--- a/bin/update-default-backgrounds
+++ b/bin/update-default-backgrounds
@@ -1,12 +1,14 @@
 #!/bin/sh
 
 DESTDIR=share/desktop-base/kali-theme/
-DESKTOP_BACKGROUND=$1
-LOGIN_BACKGROUND=$2
+DESKTOP_BACKGROUND=$(echo $1 | sed 's/\..\+//')
+DESKTOP_BACKGROUND_EXTENSION=$(echo $1 | grep -o '\..\+')
+LOGIN_BACKGROUND=$(echo $2 | sed 's/\..\+//')
+LOGIN_BACKGROUND_EXTENSION=$(echo $2 | grep -o '\..\+')
 
 # login/lockscreen
 ln -sfv ../../../backgrounds/kali/$LOGIN_BACKGROUND.xml ${DESTDIR}lockscreen/gnome-background.xml
-ln -sfv ../../../backgrounds/kali/$LOGIN_BACKGROUND-16x9.png ${DESTDIR}login/background
+ln -sfv ../../../backgrounds/kali/$LOGIN_BACKGROUND-16x9${LOGIN_BACKGROUND_EXTENSION} ${DESTDIR}login/background
 
 # desktop background
 kde_wallpaper=$(echo $DESKTOP_BACKGROUND | sed -E 's/(^|-)([a-z])/\U\2/g')
@@ -17,4 +19,4 @@ sed -i "s/defaultWallpaperTheme=.*/defaultWallpaperTheme=${kde_wallpaper}/" shar
 
 # default background symlink for XFCE
 mkdir -p share/backgrounds/kali-16x9
-ln -sf $DESKTOP_BACKGROUND.png share/backgrounds/kali-16x9/default
+ln -sf $DESKTOP_BACKGROUND${DESKTOP_BACKGROUND_EXTENSION} share/backgrounds/kali-16x9/default
diff --git a/debian/changelog b/debian/changelog
index d25fa151..3d508f34 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -8,8 +8,9 @@ kali-themes (2024.1.0) kali-dev; urgency=medium
   * Depend on 2024 wallpapers package
   * Add bottom black gradient to iso boot background
   * Configure new  default wallpapers
+  * Use jpg file for background and login images
 
- -- Daniel Ruiz de Alegría <daniruiz@kali.org>  Mon, 22 Jan 2024 13:32:57 +0100
+ -- Daniel Ruiz de Alegría <daniruiz@kali.org>  Mon, 22 Jan 2024 14:46:04 +0100
 
 kali-themes (2023.4.5) kali-dev; urgency=medium
 
diff --git a/share/backgrounds/kali-16x9/default b/share/backgrounds/kali-16x9/default
index 4d0debfa..5989c2ba 120000
--- a/share/backgrounds/kali-16x9/default
+++ b/share/backgrounds/kali-16x9/default
@@ -1 +1 @@
-kali-ferrofluid.png
\ No newline at end of file
+kali-ferrofluid.jpg
\ No newline at end of file
diff --git a/share/desktop-base/kali-theme/login/background b/share/desktop-base/kali-theme/login/background
index 6a1abbf0..e74b63cd 120000
--- a/share/desktop-base/kali-theme/login/background
+++ b/share/desktop-base/kali-theme/login/background
@@ -1 +1 @@
-../../../backgrounds/kali/kali-aqua-16x9.png
\ No newline at end of file
+../../../backgrounds/kali/kali-aqua-16x9.jpg
\ No newline at end of file