diff --git a/openappstack/cluster.py b/openappstack/cluster.py
index 6caf135c88fddfb22531a9fd946f4cf7bbfcbd8c..960914624f08ee101e0644d4c98df07f4d96dce2 100644
--- a/openappstack/cluster.py
+++ b/openappstack/cluster.py
@@ -35,7 +35,7 @@ DEFAULT_REGION = 'ams1'
 DEFAULT_DISK_SIZE_GB = 30
 """Default amount of memory"""
 DEFAULT_MEMORY_SIZE_MB = 12288
-"""Default "image" (operating system): 19  =  Debian bullseye-x64 """
+"""Default "image" (operating system): 26  =  Debian bullseye-x64 """
 DEFAULT_IMAGE = 26