diff --git a/config/Migrations/20161029230233_StateMachineInit.php b/config/Migrations/20161029230233_StateMachineInit.php
index 950861e..c76cd0b 100644
--- a/config/Migrations/20161029230233_StateMachineInit.php
+++ b/config/Migrations/20161029230233_StateMachineInit.php
@@ -48,7 +48,7 @@ public function up(): void
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('name', 'string', [
                 'default' => null,
@@ -71,7 +71,7 @@ public function up(): void
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('identifier', 'integer', [
                 'default' => null,
@@ -94,13 +94,13 @@ public function up(): void
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('state_machine_item_id', 'integer', [
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('identifier', 'integer', [
                 'default' => null,
@@ -164,13 +164,13 @@ public function up(): void
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('state_machine_process_id', 'integer', [
                 'default' => null,
                 'limit' => 11,
                 'null' => false,
-                'signed' => false,
+                'signed' => true,
             ])
             ->addColumn('identifier', 'integer', [
                 'default' => null,