diff --git a/stacks/lab/compose.yaml b/stacks/lab/compose.yaml
index bf95aff0..1b4732c5 100644
--- a/stacks/lab/compose.yaml
+++ b/stacks/lab/compose.yaml
@@ -61,7 +61,7 @@ services:
   # ---------------------------------------------------------------------------
   prometheus:
     <<: *service-defaults
-    image: prom/prometheus:v3.15.0@sha256:efd719c99d83b060d9daefdcf00360461adf279f45ef5391f8d111892118753e
+    image: prom/prometheus:v3.15.1@sha256:fa3302279710be2f21a8301ec17a8b4f2301fd829bd113839b3b6b02b6f191a2
     container_name: lab-prometheus
     user: "65534:65534"
     # The estate's block, copied as it stands (#845). The reasoning, and the