diff --git a/docker/conf/prometheus.yml b/docker/conf/prometheus.yml
--- a/docker/conf/prometheus.yml
+++ b/docker/conf/prometheus.yml
@@ -30,7 +30,7 @@
     static_configs:
     - targets:
         - swh-web:5004
-    metrics_path: /metrics/prometheus
+    metrics_path: /metrics/prometheus/
 
   - job_name: swh-counters-exporter
     static_configs:
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -9,6 +9,8 @@
   zookeeper:
     image: wurstmeister/zookeeper
     restart: always
+    environment:
+        ZOO_LOG4J_PROP: WARN,CONSOLE
 
   kafka:
     image: wurstmeister/kafka
diff --git a/docker/env/workers.env b/docker/env/workers.env
--- a/docker/env/workers.env
+++ b/docker/env/workers.env
@@ -1,4 +1,4 @@
 CONCURRENCY=1
 MAX_TASKS_PER_CHILD=10
-LOGLEVEL=DEBUG
+LOGLEVEL=INFO
 SWH_SCHEDULER_INSTANCE=http://swh-scheduler:5008