diff --git a/Zotlabs/Module/Settings/Oauth2.php b/Zotlabs/Module/Settings/Oauth2.php
index 8db5c14aa..985095115 100644
--- a/Zotlabs/Module/Settings/Oauth2.php
+++ b/Zotlabs/Module/Settings/Oauth2.php
@@ -14,7 +14,8 @@ class Oauth2 {
 			$key = $_POST['remove'];
 			q("DELETE FROM tokens WHERE id='%s' AND uid=%d",
 				dbesc($key),
-				local_channel());
+				intval(local_channel())
+			);
 			goaway(z_root()."/settings/oauth2/");
 			return;			
 		}
diff --git a/Zotlabs/Update/_1214.php b/Zotlabs/Update/_1214.php
new file mode 100644
index 000000000..06e5d96ed
--- /dev/null
+++ b/Zotlabs/Update/_1214.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Zotlabs\Update;
+
+class _1214 {
+
+	function run() {
+		if(ACTIVE_DBTYPE == DBTYPE_POSTGRES) {
+			q("START TRANSACTION");
+
+			$r1 = q("ALTER TABLE oauth_clients ALTER COLUMN user_id TYPE bigint USING user_id::bigint");
+			$r2 = q("ALTER TABLE oauth_clients ALTER COLUMN user_id SET NOT NULL");
+			$r3 = q("ALTER TABLE oauth_clients ALTER COLUMN user_id SET DEFAULT 0");
+
+			$r4 = q("ALTER TABLE oauth_access_tokens ALTER COLUMN user_id TYPE bigint USING user_id::bigint");
+			$r5 = q("ALTER TABLE oauth_access_tokens ALTER COLUMN user_id SET NOT NULL");
+			$r6 = q("ALTER TABLE oauth_access_tokens ALTER COLUMN user_id SET DEFAULT 0");
+
+			$r7 = q("ALTER TABLE oauth_authorization_codes ALTER COLUMN user_id TYPE bigint USING user_id::bigint");
+			$r8 = q("ALTER TABLE oauth_authorization_codes ALTER COLUMN user_id SET NOT NULL");
+			$r9 = q("ALTER TABLE oauth_authorization_codes ALTER COLUMN user_id SET DEFAULT 0");
+
+			$r10 = q("ALTER TABLE oauth_refresh_tokens ALTER COLUMN user_id TYPE bigint USING user_id::bigint");
+			$r11 = q("ALTER TABLE oauth_refresh_tokens ALTER COLUMN user_id SET NOT NULL");
+			$r12 = q("ALTER TABLE oauth_refresh_tokens ALTER COLUMN user_id SET DEFAULT 0");
+
+
+			if($r1 && $r2 && $r3 && $r4 && $r5 && $r6 && $r7 && $r8 && $r9 && $r10 && $r11 && $r12) {
+				q("COMMIT");
+				return UPDATE_SUCCESS;
+			}
+			else {        
+				q("ROLLBACK");
+				return UPDATE_FAILED;
+			}
+		}
+		else {
+			q("START TRANSACTION");
+
+			$r1 = q("ALTER TABLE oauth_clients MODIFY COLUMN user_id int(10) unsigned NOT NULL DEFAULT 0");
+			$r2 = q("ALTER TABLE oauth_access_tokens MODIFY COLUMN user_id int(10) unsigned NOT NULL DEFAULT 0");
+			$r3 = q("ALTER TABLE oauth_authorization_codes MODIFY COLUMN user_id int(10) unsigned NOT NULL DEFAULT 0");
+			$r4 = q("ALTER TABLE oauth_refresh_tokens MODIFY COLUMN user_id int(10) unsigned NOT NULL DEFAULT 0");
+
+			if($r1 && $r2 && $r3 && $r4) {
+				q("COMMIT");
+				return UPDATE_SUCCESS;
+			}
+			else {        
+				q("ROLLBACK");
+				return UPDATE_FAILED;
+			}
+
+		}
+	}
+
+}
diff --git a/boot.php b/boot.php
index 64d5bae4c..3e3dc532a 100755
--- a/boot.php
+++ b/boot.php
@@ -54,7 +54,7 @@ define ( 'STD_VERSION',             '3.4' );
 define ( 'ZOT_REVISION',            '6.0a' );
 
 
-define ( 'DB_UPDATE_VERSION',       1213 );
+define ( 'DB_UPDATE_VERSION',       1214 );
 
 define ( 'PROJECT_BASE',   __DIR__ );
 
diff --git a/install/schema_mysql.sql b/install/schema_mysql.sql
index 9bf91fc51..9685a878e 100644
--- a/install/schema_mysql.sql
+++ b/install/schema_mysql.sql
@@ -1606,14 +1606,14 @@ CREATE TABLE if not exists oauth_clients (
   redirect_uri          VARCHAR(2000),
   grant_types           VARCHAR(80),
   scope                 VARCHAR(4000),
-  user_id               VARCHAR(80),
+  user_id               int(10) unsigned NOT NULL DEFAULT 0,
   PRIMARY KEY (client_id)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE if not exists oauth_access_tokens (
   access_token         VARCHAR(40)    NOT NULL,
   client_id            VARCHAR(80)    NOT NULL,
-  user_id              VARCHAR(255),
+  user_id              int(10) unsigned NOT NULL DEFAULT 0,
   expires              TIMESTAMP      NOT NULL,
   scope                VARCHAR(4000),
   PRIMARY KEY (access_token)
@@ -1622,7 +1622,7 @@ CREATE TABLE if not exists oauth_access_tokens (
 CREATE TABLE if not exists oauth_authorization_codes (
   authorization_code  VARCHAR(40)     NOT NULL,
   client_id           VARCHAR(80)     NOT NULL,
-  user_id             VARCHAR(255),
+  user_id             int(10) unsigned NOT NULL DEFAULT 0,
   redirect_uri        VARCHAR(2000),
   expires             TIMESTAMP       NOT NULL,
   scope               VARCHAR(4000),
@@ -1633,7 +1633,7 @@ CREATE TABLE if not exists oauth_authorization_codes (
 CREATE TABLE if not exists oauth_refresh_tokens (
   refresh_token       VARCHAR(40)     NOT NULL,
   client_id           VARCHAR(80)     NOT NULL,
-  user_id             VARCHAR(255),
+  user_id             int(10) unsigned NOT NULL DEFAULT 0,
   expires             TIMESTAMP       NOT NULL,
   scope               VARCHAR(4000),
   PRIMARY KEY (refresh_token)
diff --git a/install/schema_postgres.sql b/install/schema_postgres.sql
index 3fba5b546..4584e4f2e 100644
--- a/install/schema_postgres.sql
+++ b/install/schema_postgres.sql
@@ -1620,14 +1620,14 @@ CREATE TABLE oauth_clients (
   redirect_uri          VARCHAR(2000),
   grant_types           VARCHAR(80),
   scope                 VARCHAR(4000),
-  user_id               VARCHAR(80),
+  user_id               bigint NOT NULL DEFAULT '0',
   PRIMARY KEY (client_id)
 );
 
 CREATE TABLE oauth_access_tokens (
   access_token         VARCHAR(40)    NOT NULL,
   client_id            VARCHAR(80)    NOT NULL,
-  user_id              VARCHAR(255),
+  user_id              bigint NOT NULL DEFAULT '0',
   expires              TIMESTAMP      NOT NULL,
   scope                VARCHAR(4000),
   PRIMARY KEY (access_token)
@@ -1636,7 +1636,7 @@ CREATE TABLE oauth_access_tokens (
 CREATE TABLE oauth_authorization_codes (
   authorization_code  VARCHAR(40)     NOT NULL,
   client_id           VARCHAR(80)     NOT NULL,
-  user_id             VARCHAR(255),
+  user_id             bigint NOT NULL DEFAULT '0',
   redirect_uri        VARCHAR(2000),
   expires             TIMESTAMP       NOT NULL,
   scope               VARCHAR(4000),
@@ -1647,7 +1647,7 @@ CREATE TABLE oauth_authorization_codes (
 CREATE TABLE oauth_refresh_tokens (
   refresh_token       VARCHAR(40)     NOT NULL,
   client_id           VARCHAR(80)     NOT NULL,
-  user_id             VARCHAR(255),
+  user_id             bigint NOT NULL DEFAULT '0',
   expires             TIMESTAMP       NOT NULL,
   scope               VARCHAR(4000),
   PRIMARY KEY (refresh_token)