diff --git a/authentik/outposts/controllers/base.py b/authentik/outposts/controllers/base.py
index 92a3ef710..33b2acaa0 100644
--- a/authentik/outposts/controllers/base.py
+++ b/authentik/outposts/controllers/base.py
@@ -61,6 +61,4 @@ class BaseController:
     def get_container_image(self) -> str:
         """Get container image to use for this outpost"""
         image_name_template: str = CONFIG.y("outposts.docker_image_base")
-        return image_name_template.format(
-            {"type": self.outpost.type, "version": __version__}
-        )
+        return image_name_template % {"type": self.outpost.type, "version": __version__}