diff --git a/Resources/migrations/Version20160818113633.php b/Resources/migrations/Version20160818113633.php
index eed0a3b14..afb43607b 100644
--- a/Resources/migrations/Version20160818113633.php
+++ b/Resources/migrations/Version20160818113633.php
@@ -22,6 +22,7 @@ class Version20160818113633 extends AbstractMigration
         $personIdAndCFData = $this->connection->executeQuery('SELECT id, cfdata FROM person');
 
         $this->addSQL('ALTER TABLE person RENAME COLUMN cfdata TO cfdata_old');
+        $this->addSql('ALTER TABLE person ALTER COLUMN cfdata_old DROP NOT NULL');
         $this->addSQL('ALTER TABLE person ADD COLUMN cfdata jsonb');
 
         foreach ($personIdAndCFData as $person) {
@@ -44,5 +45,6 @@ class Version20160818113633 extends AbstractMigration
     {
         $this->addSQL('ALTER TABLE person DROP COLUMN cfdata');
         $this->addSQL('ALTER TABLE person RENAME COLUMN cfdata_old TO cfdata');
+        $this->addSql('ALTER TABLE person ALTER COLUMN cfdata SET NOT NULL');
     }
 }