diff --git a/Containerfile b/Containerfile
index b1d1981..ed8a983 100644
--- a/Containerfile
+++ b/Containerfile
@@ -30,9 +30,10 @@ COPY . .
 
 RUN pip install /usr/src/app
 
-# Docker-specific configuration and default to IPv4
+# Docker-specific configuration
+# defaulting to IPv4 is no longer necessary (default host is dual stack)
 ENV MALOJA_SKIP_SETUP=yes
-ENV MALOJA_HOST=0.0.0.0
+ENV PYTHONUNBUFFERED=1
 
 EXPOSE 42010
 # use exec form for better signal handling https://docs.docker.com/engine/reference/builder/#entrypoint
diff --git a/dev/templates/Containerfile.jinja b/dev/templates/Containerfile.jinja
index 0eb8063..7a99f03 100644
--- a/dev/templates/Containerfile.jinja
+++ b/dev/templates/Containerfile.jinja
@@ -30,9 +30,10 @@ COPY . .
 
 RUN pip install /usr/src/app
 
-# Docker-specific configuration and default to IPv4
+# Docker-specific configuration
+# defaulting to IPv4 is no longer necessary (default host is dual stack)
 ENV MALOJA_SKIP_SETUP=yes
-ENV MALOJA_HOST=0.0.0.0
+ENV PYTHONUNBUFFERED=1
 
 EXPOSE 42010
 # use exec form for better signal handling https://docs.docker.com/engine/reference/builder/#entrypoint