diff --git a/etc/docker/inbucket.conf b/etc/docker/inbucket.conf
index 50f9055..eea72f8 100644
--- a/etc/docker/inbucket.conf
+++ b/etc/docker/inbucket.conf
@@ -73,7 +73,7 @@ ip4.address=0.0.0.0
 ip4.port=10080
 
 # Name of web theme to use
-theme=integral
+theme=bootstrap
 
 # Path to the selected themes template files
 template.dir=%(install.dir)s/themes/%(theme)s/templates
diff --git a/etc/inbucket.conf b/etc/inbucket.conf
index e23649b..eebb0e6 100644
--- a/etc/inbucket.conf
+++ b/etc/inbucket.conf
@@ -70,7 +70,7 @@ ip4.address=0.0.0.0
 ip4.port=9000
 
 # Name of web theme to use
-theme=integral
+theme=bootstrap
 
 # Path to the selected themes template files
 template.dir=%(install.dir)s/themes/%(theme)s/templates
diff --git a/etc/unix-sample.conf b/etc/unix-sample.conf
index 14996d1..ebe03b9 100644
--- a/etc/unix-sample.conf
+++ b/etc/unix-sample.conf
@@ -70,7 +70,7 @@ ip4.address=0.0.0.0
 ip4.port=80
 
 # Name of web theme to use
-theme=integral
+theme=bootstrap
 
 # Path to the selected themes template files
 template.dir=%(install.dir)s/themes/%(theme)s/templates
diff --git a/etc/win-sample.conf b/etc/win-sample.conf
index 235a486..34b426f 100644
--- a/etc/win-sample.conf
+++ b/etc/win-sample.conf
@@ -70,7 +70,7 @@ ip4.address=0.0.0.0
 ip4.port=9000
 
 # Name of web theme to use
-theme=integral
+theme=bootstrap
 
 # Path to the selected themes template files
 template.dir=%(install.dir)s\themes\%(theme)s\templates