diff --git a/rocky/Dockerfile b/rocky/Dockerfile
index c16bf4593d7..6cc26665d73 100644
--- a/rocky/Dockerfile
+++ b/rocky/Dockerfile
@@ -69,4 +69,7 @@ RUN export SECRET_KEY="secret" BYTES_API="http://bytes:8000" BYTES_PASSWORD="pas
 
 USER rocky
 
+# Workaround for https://github.com/emmett-framework/granian/issues/287
+ENV GRANIAN_HTTP=1
+
 CMD ["granian", "--interface", "wsgi", "rocky.wsgi:application", "--host", "0.0.0.0"]
diff --git a/rocky/packaging/deb/data/usr/lib/kat/rocky.defaults b/rocky/packaging/deb/data/usr/lib/kat/rocky.defaults
index 1bbb4cdcb84..e722fe1826d 100644
--- a/rocky/packaging/deb/data/usr/lib/kat/rocky.defaults
+++ b/rocky/packaging/deb/data/usr/lib/kat/rocky.defaults
@@ -6,3 +6,5 @@ BYTES_API=http://localhost:8002
 STATIC_ROOT=/usr/share/kat-rocky/static
 GRANIAN_WORKERS=2
 GRANIAN_THREADS=4
+# Workaround for https://github.com/emmett-framework/granian/issues/287
+GRANIAN_HTTP=1