diff --git a/app/config/collections.php b/app/config/collections.php
index fc7af6b7c7..6c4388db9a 100644
--- a/app/config/collections.php
+++ b/app/config/collections.php
@@ -2007,7 +2007,7 @@ $collections = [
                 '$id' => 'stderr',
                 'type' => Database::VAR_STRING,
                 'format' => '',
-                'size' => 1048576,
+                'size' => 1000000,
                 'signed' => true,
                 'required' => false,
                 'default' => '',
@@ -2018,7 +2018,7 @@ $collections = [
                 '$id' => 'stdout',
                 'type' => Database::VAR_STRING,
                 'format' => '',
-                'size' => 1048576,
+                'size' => 1000000,
                 'signed' => true,
                 'required' => false,
                 'default' => '',
@@ -2124,7 +2124,7 @@ $collections = [
                 '$id' => 'stdout',
                 'type' => Database::VAR_STRING,
                 'format' => '',
-                'size' => 1048576,
+                'size' => 1000000,
                 'signed' => true,
                 'required' => false,
                 'default' => null,
@@ -2135,7 +2135,7 @@ $collections = [
                 '$id' => 'stderr',
                 'type' => Database::VAR_STRING,
                 'format' => '',
-                'size' => 1048576,
+                'size' => 1000000,
                 'signed' => true,
                 'required' => false,
                 'default' => null,
diff --git a/app/executor.php b/app/executor.php
index 0585ca7287..31f1738f53 100644
--- a/app/executor.php
+++ b/app/executor.php
@@ -283,8 +283,8 @@ App::post('/v1/runtimes')
             $endTime = \time();
             $container = array_merge($container, [
                 'status' => 'ready',
-                'stdout' => \mb_substr(\utf8_encode($stdout), 0, 1048576), // Limit to 1MB
-                'stderr' => \mb_substr(\utf8_encode($stderr), 0, 1048576), // Limit to 1MB
+                'stdout' => \mb_strcut(\utf8_encode($stdout), 0, 1000000), // Limit to 1MB
+                'stderr' => \mb_strcut(\utf8_encode($stderr), 0, 1000000), // Limit to 1MB
                 'startTime' => $startTime,
                 'endTime' => $endTime,
                 'duration' => $endTime - $startTime,
@@ -501,8 +501,8 @@ App::post('/v1/execution')
             $execution = [
                 'status' => $functionStatus,
                 'statusCode' => $statusCode,
-                'stdout' => \mb_substr(\utf8_encode($stdout), 0, 1048576), // Limit to 1MB
-                'stderr' => \mb_substr(\utf8_encode($stderr), 0, 1048576), // Limit to 1MB
+                'stdout' => \mb_strcut(\utf8_encode($stdout), 0, 1000000), // Limit to 1MB
+                'stderr' => \mb_strcut(\utf8_encode($stderr), 0, 1000000), // Limit to 1MB
                 'time' => $executionTime,
             ];
 
diff --git a/open-runtimes b/open-runtimes
new file mode 160000
index 0000000000..c4f2c21404
--- /dev/null
+++ b/open-runtimes
@@ -0,0 +1 @@
+Subproject commit c4f2c21404011a5a75dc891ff892695534b2df76