diff --git a/infra/docker-compose.local.yml b/infra/docker-compose.local.yml
index a03cacd..a148115 100644
--- a/infra/docker-compose.local.yml
+++ b/infra/docker-compose.local.yml
@@ -583,6 +583,9 @@ services:
   objecttypen-init:
     image: docker.io/maykinmedia/objecttypes-api:${OBJECTTYPES_TAG:-3.4.2}
     environment: &objecttypen-env-local
+      # 1 uWSGI worker, not the image default of 4×4 (#144) — idle workers starve the CI runner.
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objecttypes.conf.docker
       SECRET_KEY: ${OBJECTTYPES_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecttypen-db
@@ -644,6 +647,9 @@ services:
   objecten-init:
     image: docker.io/maykinmedia/objects-api:${OBJECTS_TAG:-3.4.0}
     environment: &objecten-env-local
+      # 1 uWSGI worker, not the image default of 4×4 (#144) — idle workers starve the CI runner.
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objects.conf.docker
       SECRET_KEY: ${OBJECTS_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecten-db
diff --git a/infra/docker-compose.yml b/infra/docker-compose.yml
index 2d0b2a0..c7a1fde 100644
--- a/infra/docker-compose.yml
+++ b/infra/docker-compose.yml
@@ -596,6 +596,11 @@ services:
   objecttypen-init:
     image: docker.io/maykinmedia/objecttypes-api:${OBJECTTYPES_TAG:-3.4.2}
     environment: &objecttypen-env
+      # 1 uWSGI worker, not the image default of 4×4: this API only serves single-request smoke
+      # checks and sits idle during the e2e step — 4 idle Django workers each pin ~200 MB and starve
+      # the shared CI runner (#144). Init ignores this (it runs setup_configuration, not uwsgi).
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objecttypes.conf.docker
       SECRET_KEY: ${OBJECTTYPES_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecttypen-db
@@ -662,6 +667,9 @@ services:
   objecten-init:
     image: docker.io/maykinmedia/objects-api:${OBJECTS_TAG:-3.4.0}
     environment: &objecten-env
+      # 1 uWSGI worker, not the image default of 4×4 — see the objecttypen note above (#144).
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objects.conf.docker
       SECRET_KEY: ${OBJECTS_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecten-db