diff --git a/roles/matrix-synapse/defaults/main.yml b/roles/matrix-synapse/defaults/main.yml
index 39a88333b..d966665f9 100644
--- a/roles/matrix-synapse/defaults/main.yml
+++ b/roles/matrix-synapse/defaults/main.yml
@@ -15,8 +15,8 @@ matrix_synapse_docker_image_name_prefix: "{{ 'localhost/' if matrix_synapse_cont
 # amd64 gets released first.
 # arm32 relies on self-building, so the same version can be built immediately.
 # arm64 users need to wait for a prebuilt image to become available.
-matrix_synapse_version: v1.33.2
-matrix_synapse_version_arm64: v1.33.2
+matrix_synapse_version: v1.34.0
+matrix_synapse_version_arm64: v1.34.0
 matrix_synapse_docker_image_tag: "{{ matrix_synapse_version if matrix_architecture in ['arm32', 'amd64'] else matrix_synapse_version_arm64 }}"
 matrix_synapse_docker_image_force_pull: "{{ matrix_synapse_docker_image.endswith(':latest') }}"
 
@@ -454,6 +454,7 @@ matrix_synapse_sentry_dsn: ""
 
 # Postgres database information
 matrix_synapse_database_host: "matrix-postgres"
+matrix_synapse_database_port: 5432
 matrix_synapse_database_user: "synapse"
 matrix_synapse_database_password: ""
 matrix_synapse_database_database: "synapse"
diff --git a/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2 b/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
index df280dd54..22f5f1ea4 100644
--- a/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
+++ b/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
@@ -128,6 +128,16 @@ default_room_version: {{ matrix_synapse_default_room_version|to_json }}
 #
 #gc_thresholds: [700, 10, 10]
 
+# The minimum time in seconds between each GC for a generation, regardless of
+# the GC thresholds. This ensures that we don't do GC too frequently.
+#
+# A value of `[1s, 10s, 30s]` indicates that a second must pass between consecutive
+# generation 0 GCs, etc.
+#
+# Defaults to `[1s, 10s, 30s]`.
+#
+#gc_min_interval: [0.5s, 30s, 1m]
+
 # Set the limit on the returned events in the timeline in the get
 # and sync operations. The default value is 100. -1 means no upper limit.
 #
@@ -757,6 +767,12 @@ federation_domain_whitelist: {{ matrix_synapse_federation_domain_whitelist|to_js
 #
 #allow_profile_lookup_over_federation: false
 
+# Uncomment to disable device display name lookup over federation. By default, the
+# Federation API allows other homeservers to obtain device display names of any user
+# on this homeserver. Defaults to 'true'.
+#
+#allow_device_name_lookup_over_federation: false
+
 
 ## Caching ##
 
@@ -813,6 +829,7 @@ database:
     password: {{ matrix_synapse_database_password|string|to_json }}
     database: "{{ matrix_synapse_database_database }}"
     host: "{{ matrix_synapse_database_host }}"
+    port: {{ matrix_synapse_database_port }}
     cp_min: 5
     cp_max: 10
 
@@ -1519,6 +1536,7 @@ room_prejoin_state:
    # - m.room.avatar
    # - m.room.encryption
    # - m.room.name
+   # - m.room.create
    #
    # Uncomment the following to disable these defaults (so that only the event
    # types listed in 'additional_event_types' are shared). Defaults to 'false'.