diff --git a/.github/workflows/php-test.yml b/.github/workflows/php-test.yml
index 4a04745..06a257e 100644
--- a/.github/workflows/php-test.yml
+++ b/.github/workflows/php-test.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         php-versions: ['7.3', '7.4']
-        nextcloud-versions: ['stable19', 'stable20', 'stable21', 'master']
+        nextcloud-versions: ['stable19', 'stable20', 'stable21']
         include:
           - php-versions: '7.2'
             nextcloud-versions: 'stable19'
@@ -20,8 +20,6 @@ jobs:
             nextcloud-versions: 'stable20'
           - php-versions: '8.0'
             nextcloud-versions: 'stable21'
-          - php-versions: '8.0'
-            nextcloud-versions: 'master'
     name: php${{ matrix.php-versions }} on ${{ matrix.nextcloud-versions }} unit tests
     env:
       CI: true
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 42cfec9..1e833a9 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -40,7 +40,7 @@ Developer wanted! If you have time it would be awesome if you could help to enha
         <lib>curl</lib>
         <lib>mbstring</lib>
         <lib>SimpleXML</lib>
-        <nextcloud min-version="18" max-version="20"/>
+        <nextcloud min-version="19" max-version="21"/>
     </dependencies>
     <settings>
         <admin>OCA\BigBlueButton\Settings\Admin</admin>
diff --git a/lib/Migration/Version000000Date20200416124731.php b/lib/Migration/Version000000Date20200416124731.php
index 4ddfbbb..d106d1c 100644
--- a/lib/Migration/Version000000Date20200416124731.php
+++ b/lib/Migration/Version000000Date20200416124731.php
@@ -28,7 +28,6 @@ class Version000000Date20200416124731 extends SimpleMigrationStep {
 				'notnull'       => true,
 			]);
 			$table->addColumn('uid', 'string', [
-				'unique'  => true,
 				'notnull' => true,
 				'length'  => 64
 			]);
diff --git a/lib/Migration/Version000000Date20200826100844.php b/lib/Migration/Version000000Date20200826100844.php
index 6c55580..dcc5715 100644
--- a/lib/Migration/Version000000Date20200826100844.php
+++ b/lib/Migration/Version000000Date20200826100844.php
@@ -31,7 +31,6 @@ class Version000000Date20200826100844 extends SimpleMigrationStep {
 				'notnull'       => true,
 			]);
 			$table->addColumn('group_id', 'string', [
-				'unique'  => true,
 				'notnull' => true,
 				'length'  => 200,
 			]);
diff --git a/lib/Migration/Version000000Date20210122164501.php b/lib/Migration/Version000000Date20210122164501.php
index a2cb558..75a975e 100644
--- a/lib/Migration/Version000000Date20210122164501.php
+++ b/lib/Migration/Version000000Date20210122164501.php
@@ -29,7 +29,6 @@ class Version000000Date20210122164501 extends SimpleMigrationStep {
 			if (!$table->hasColumn('moderator_token')) {
 				$table->addColumn('moderator_token', 'string', [
 					'notnull' => false,
-					'unique'  => true,
 					'length'  => 64
 				]);
 			}