diff --git a/templates/deployment-sidekiq.yaml b/templates/deployment-sidekiq.yaml
index 8a0e9e8..6aac6e8 100644
--- a/templates/deployment-sidekiq.yaml
+++ b/templates/deployment-sidekiq.yaml
@@ -9,6 +9,10 @@ metadata:
     {{- include "mastodon.labels" $context | nindent 4 }}
     app.kubernetes.io/component: sidekiq-{{ .name }}
     app.kubernetes.io/part-of: rails
+  annotations:
+    {{- with $context.Values.deployAnnotations }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
 spec:
   {{- if (has "scheduler" .queues) }}
     {{- if (gt (int .replicas) 1) }}
diff --git a/templates/deployment-streaming.yaml b/templates/deployment-streaming.yaml
index dd80404..1e690ac 100644
--- a/templates/deployment-streaming.yaml
+++ b/templates/deployment-streaming.yaml
@@ -4,6 +4,10 @@ metadata:
   name: {{ include "mastodon.fullname" . }}-streaming
   labels:
     {{- include "mastodon.labels" . | nindent 4 }}
+  annotations:
+    {{- with .Values.deployAnnotations }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
 spec:
   replicas: {{ .Values.mastodon.streaming.replicas }}
   selector:
diff --git a/templates/deployment-web.yaml b/templates/deployment-web.yaml
index 30308e2..e707b3c 100644
--- a/templates/deployment-web.yaml
+++ b/templates/deployment-web.yaml
@@ -4,6 +4,10 @@ metadata:
   name: {{ include "mastodon.fullname" . }}-web
   labels:
     {{- include "mastodon.labels" . | nindent 4 }}
+  annotations:
+    {{- with .Values.deployAnnotations }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
 spec:
   replicas: {{ .Values.mastodon.web.replicas }}
   selector:
diff --git a/values.yaml b/values.yaml
index ea9848b..c8c5d96 100644
--- a/values.yaml
+++ b/values.yaml
@@ -408,6 +408,10 @@ serviceAccount:
   # If not set and create is true, a name is generated using the fullname template
   name: ""
 
+# Custom annotations to apply to all created deployment objects. These can be
+# used to help mastodon interact with other services in the cluster.
+deployAnnotations: {}
+
 # -- Kubernetes manages pods for jobs and pods for deployments differently, so you might
 # need to apply different annotations to the two different sets of pods. The annotations
 # set with podAnnotations will be added to all deployment-managed pods.