diff --git a/dev/templates/Containerfile.jinja b/dev/templates/Containerfile.jinja
index e180abd..71b2195 100644
--- a/dev/templates/Containerfile.jinja
+++ b/dev/templates/Containerfile.jinja
@@ -39,9 +39,10 @@ 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/pyproject.toml b/pyproject.toml
index b6f30c8..78b4a16 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "malojaserver"
 version = "3.0.5"
 description = "Self-hosted music scrobble database"
 readme = "./README.md"
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 license = { file="./LICENSE" }
 authors = [ { name="Johannes Krattenmacher", email="maloja@dev.krateng.ch" } ]
 
@@ -20,12 +20,12 @@ classifiers = [
 
 dependencies = [
 	"bottle>=0.12.16",
-	"waitress>=1.3",
+	"waitress>=2.1.0",
 	"doreah>=1.9.1, <2",
 	"nimrodel>=0.8.0",
 	"setproctitle>=1.1.10",
 	#"pyvips>=2.1.16",
-	"jinja2>=2.11",
+	"jinja2>=3.0.0",
 	"lru-dict>=1.1.6",
 	"psutil>=5.8.0",
 	"sqlalchemy>=1.4",
diff --git a/requirements.txt b/requirements.txt
index d4f1bf4..77b1e34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,10 @@
 bottle>=0.12.16
-waitress>=1.3
+waitress>=2.1.0
 doreah>=1.9.1, <2
 nimrodel>=0.8.0
 setproctitle>=1.1.10
-jinja2>=2.11
+jinja2>=3.0.0
 lru-dict>=1.1.6
-css_html_js_minify>=2.5.5
 psutil>=5.8.0
 sqlalchemy>=1.4
 python-datauri>=1.1.0