diff --git a/charts/stable/synapse/Chart.yaml b/charts/stable/synapse/Chart.yaml
index fa4878520b5..7f03074347f 100644
--- a/charts/stable/synapse/Chart.yaml
+++ b/charts/stable/synapse/Chart.yaml
@@ -24,7 +24,7 @@ maintainers:
 name: synapse
 sources: []
 type: application
-version: 2.1.1
+version: 2.1.2
 annotations:
   truecharts.org/catagories: |
     - cloud
diff --git a/charts/stable/synapse/templates/_configmap.tpl b/charts/stable/synapse/templates/_configmap.tpl
index 988b36f014a..9b66796a21a 100644
--- a/charts/stable/synapse/templates/_configmap.tpl
+++ b/charts/stable/synapse/templates/_configmap.tpl
@@ -90,17 +90,16 @@ data:
     registration_requires_token: {{ .Values.matrix.registration.requiresToken }}
 
     {{- if .Values.matrix.registration.require3PID }}
-    registrations_require_3pid:
-        {{- range .Values.matrix.registration.require3PID }}
-        {{ print "- " (.medium | quote) }}
-        {{- end }}
+    {{/* It seems toYaml doesn't work on lists/arrays */}}
+    registrations_require_3pid: {{- print " " -}}{{ .Values.matrix.registration.require3PID | toJson }}
     {{- end }}
 
     disable_msisdn_registration: {{ .Values.matrix.registration.disableMSISDNRegistration }}
     enable_3pid_lookup: {{ .Values.matrix.registration.enable3PIDLookup }}
 
     {{- if .Values.matrix.registration.allowedLocal3PIDs }}
-    allowed_local_3pids: {{- print " " -}}{{ .Values.matrix.registration.allowedLocal3PIDs | toJson -}}
+    {{/* It seems toYaml doesn't work on lists/arrays */}}
+    allowed_local_3pids: {{- print " " -}}{{ .Values.matrix.registration.allowedLocal3PIDs | toJson }}
     {{- end }}
 
     {{- end }}