diff --git a/deploy/docker-compose.candidate-slot.yml b/deploy/docker-compose.candidate-slot.yml
index 7a15d91..4d814cb 100644
--- a/deploy/docker-compose.candidate-slot.yml
+++ b/deploy/docker-compose.candidate-slot.yml
@@ -63,6 +63,7 @@ services:
       COGNITIVE_ADMISSION_MAX_ACCEPTED_PER_HOUR: ${COGNITIVE_ADMISSION_MAX_ACCEPTED_PER_HOUR:-60}
       COGNITIVE_ADMISSION_MAX_INPUT_BYTES: ${COGNITIVE_ADMISSION_MAX_INPUT_BYTES:-81920}
       COGNITIVE_ADMISSION_MAX_OUTPUT_BYTES: ${COGNITIVE_ADMISSION_MAX_OUTPUT_BYTES:-16384}
+      COGNITIVE_RUNTIME_URL: http://cognitive-worker-candidate:8083
       RESEARCH_RUNTIME_URL: http://research-runtime-candidate:8087
     volumes:
       - assistant_core_secrets:/run/secrets:ro