diff --git a/roles/matrix/tasks/main.yml b/roles/matrix/tasks/main.yml
index 894c0a4..e5f62ba 100644
--- a/roles/matrix/tasks/main.yml
+++ b/roles/matrix/tasks/main.yml
@@ -13,6 +13,25 @@
     - "{{ matrix_media_dir }}"
     - "{{ matrix_postgres_dir }}"
 
+- name: Set ownership of Matrix config dir for Synapse user (UID 991)
+  ansible.builtin.file:
+    path: "{{ matrix_config_dir }}"
+    state: directory
+    owner: "991"
+    group: "991"
+    mode: '0755'
+    recurse: yes
+
+- name: Set ownership of Matrix media dir for Synapse user
+  ansible.builtin.file:
+    path: "{{ matrix_media_dir }}"
+    state: directory
+    owner: "991"
+    group: "991"
+    mode: '0755'
+    recurse: yes
+
+
 - name: Copy log.config (static file)
   ansible.builtin.copy:
     src: log.config
diff --git a/roles/matrix/templates/docker-compose.yml.j2 b/roles/matrix/templates/docker-compose.yml.j2
index a56cef3..c188759 100644
--- a/roles/matrix/templates/docker-compose.yml.j2
+++ b/roles/matrix/templates/docker-compose.yml.j2
@@ -1,4 +1,3 @@
-version: '3.8'
 services:
   matrix-postgres:
     image: postgres:13