diff --git a/terranix/containers/matrix/matrix-synapse.hcl b/terranix/containers/matrix/matrix-synapse.hcl
index 596487e..12334dd 100644
--- a/terranix/containers/matrix/matrix-synapse.hcl
+++ b/terranix/containers/matrix/matrix-synapse.hcl
@@ -213,6 +213,10 @@ database:
 redis:
   enabled: true
   password: "{{ .Data.data.redis_password }}"
+instance_map:
+  main:
+    host: localhost
+    port: 9093
 {{ end }}
 EOF
         destination = "/secrets/extra.yaml"
@@ -354,6 +358,10 @@ database:
 redis:
   enabled: true
   password: "{{ .Data.data.redis_password }}"
+instance_map:
+  main:
+    host: localhost
+    port: 9093
 {{ end }}
 EOF
         destination = "/secrets/extra.yaml"
@@ -495,6 +503,10 @@ database:
 redis:
   enabled: true
   password: "{{ .Data.data.redis_password }}"
+instance_map:
+  main:
+    host: localhost
+    port: 9093
 {{ end }}
 EOF
         destination = "/secrets/extra.yaml"
@@ -636,6 +648,10 @@ database:
 redis:
   enabled: true
   password: "{{ .Data.data.redis_password }}"
+instance_map:
+  main:
+    host: localhost
+    port: 9093
 {{ end }}
 EOF
         destination = "/secrets/extra.yaml"
@@ -861,6 +877,10 @@ database:
 redis:
   enabled: true
   password: "{{ .Data.data.redis_password }}"
+instance_map:
+  main:
+    host: localhost
+    port: 9093
 {{ end }}
 EOF
         destination = "/secrets/extra.yaml"