diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f8be3d..d4c600e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,38 @@
 # Changelog Hiber API
 
+### 0.52 (2020-07-06)
+
+This release contains a few minor additions and some bugfixes.
+
+#### Changes
+
+##### AWSIoTService
+
+- Added `created_by`, containing the user id of the user who created this publisher, to `AWSIoTConfiguration`.
+
+##### MQTTService
+
+- Added `created_by`, containing the user id of the user who created this publisher, to `MQTTPublisher`.
+
+##### SlackIntegrationService
+
+- Added `created_by`, containing the user id of the user who created this publisher, to `SlackPublisher`.
+
+##### WebhookService
+
+- Added `created_by`, containing the user id of the user who created this publisher, to `Webhook`.
+
+##### Other
+
+- Added `created_by`, containing the user id of the user who created this publisher, to `Publisher`
+  (the generic publisher object used in events).
+
+#### Bugfixes
+
+- Fixed a bug where some message would not generate message events, because of a bug in the changes that introduced
+  the new `ModemMessageBodyReceivedEvent` and `ModemMessageBodyParsedEvent` types.
+  No data was lost, and the events will be generated by the system after the update.
+
 ### 0.51 (2020-06-29)
 
 This release introduces automatic assignment rules for modem message body parsers.
diff --git a/email_notifications.proto b/email_notifications.proto
index ef425fe..e0fc7c0 100644
--- a/email_notifications.proto
+++ b/email_notifications.proto
@@ -25,6 +25,7 @@ message EmailNotificationPreferences {
         string name = 2;
     }
 
+    /* The organization that owns this publisher */
     string organization = 1;
 
     /* Events to receive by email. */
diff --git a/integration_aws_iot.proto b/integration_aws_iot.proto
index 39c30a1..2b25584 100644
--- a/integration_aws_iot.proto
+++ b/integration_aws_iot.proto
@@ -20,6 +20,10 @@ service AWSIoTService {
 
 message AWSIoTConfiguration {
     int64 publisher_id = 1;
+
+    /* The uid of the user that created this publisher. */
+    string created_by = 12;
+
     string url = 2;
     Filter.Modems modems = 3;
     int64 certificate_id = 4;
diff --git a/integration_mqtt.proto b/integration_mqtt.proto
index 043da08..98e4731 100644
--- a/integration_mqtt.proto
+++ b/integration_mqtt.proto
@@ -25,6 +25,10 @@ service MQTTService {
 message MQTTPublisher {
     int64 id = 1;
     string description = 2;
+
+    /* The uid of the user that created this publisher */
+    string created_by = 10;
+
     Data data = 3;
     Filter.Events filter_event_types = 4;
     Filter.Modems filter_modem_numbers = 5;
diff --git a/integration_slack.proto b/integration_slack.proto
index 2c0a4b4..564efde 100644
--- a/integration_slack.proto
+++ b/integration_slack.proto
@@ -25,6 +25,10 @@ service SlackIntegrationService {
 message SlackPublisher {
     int64 id = 1;
     string description = 2;
+
+    /* The uid of the user that created this publisher */
+    string created_by = 10;
+
     Data data = 3;
     Filter.Events filter_event_types = 4;
     Filter.Modems filter_modem_numbers = 5;
diff --git a/publisher.proto b/publisher.proto
index f4890c5..4deb2b4 100644
--- a/publisher.proto
+++ b/publisher.proto
@@ -45,6 +45,9 @@ message Publisher {
     Timestamp in_cooldown_until = 8;
     bool disabled = 9;
 
+    /* Firebase uid of the user that created this publisher */
+    string created_by = 15;
+
     /* The configuration for its type. */
     oneof data {
         webhook.Webhook.WebhookData http = 10;
diff --git a/webhook.proto b/webhook.proto
index f7f7feb..6adbc60 100644
--- a/webhook.proto
+++ b/webhook.proto
@@ -28,6 +28,7 @@ service WebhookService {
 message Webhook {
     int64 id = 1;
     string organization = 2;
+    string created_by = 10;
     string description = 3;
     WebhookData data = 4;
     WebhookFilters filters = 5;