diff --git a/charts/matrix-synapse/templates/signing-key-job.yaml b/charts/matrix-synapse/templates/signing-key-job.yaml
index 526b7c5..85417c0 100644
--- a/charts/matrix-synapse/templates/signing-key-job.yaml
+++ b/charts/matrix-synapse/templates/signing-key-job.yaml
@@ -55,6 +55,10 @@ metadata:
   labels:
     {{- include "matrix-synapse.labels" . | nindent 4 }}
     app.kubernetes.io/component: signingkey-job
+  {{- with .Values.signingkey.job.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
 spec:
   ttlSecondsAfterFinished: 0
   template:
diff --git a/charts/matrix-synapse/values.yaml b/charts/matrix-synapse/values.yaml
index df163dd..c99cf80 100644
--- a/charts/matrix-synapse/values.yaml
+++ b/charts/matrix-synapse/values.yaml
@@ -47,6 +47,12 @@ signingkey:
   job:
     enabled: true
 
+    ## Annotations to apply to the signing-key-job.
+    ##
+    annotations: { }
+    #  argocd.argoproj.io/hook: PostSync
+    #  argocd.argoproj.io/hook-delete-policy: HookSucceeded
+
     generateImage:
       repository: matrixdotorg/synapse
       #tag: latest