diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index ed73c5dc..ea952128 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -54,9 +54,9 @@ public function getConfigTreeBuilder()
                     ->addDefaultsIfNotSet()
                     ->children()
                         ->booleanNode('j')->end()
-                        ->scalarNode('timeout')->end()
+                        ->integerNode('timeout')->end()
                         ->scalarNode('w')->end()
-                        ->scalarNode('wtimeout')->end()
+                        ->integerNode('wtimeout')->end()
                         // Deprecated options
                         ->booleanNode('fsync')->info('Deprecated. Please use the "j" option instead.')->end()
                         ->scalarNode('safe')->info('Deprecated. Please use the "w" option instead.')->end()
@@ -136,8 +136,8 @@ private function addDocumentManagersSection(ArrayNodeDefinition $rootNode)
                                     ->end()
                                 ->end()
                             ->end()
-                            ->scalarNode('retry_connect')->defaultValue(0)->end()
-                            ->scalarNode('retry_query')->defaultValue(0)->end()
+                            ->integerNode('retry_connect')->defaultValue(0)->end()
+                            ->integerNode('retry_query')->defaultValue(0)->end()
                             ->arrayNode('metadata_cache_driver')
                                 ->addDefaultsIfNotSet()
                                 ->beforeNormalization()
@@ -148,7 +148,7 @@ private function addDocumentManagersSection(ArrayNodeDefinition $rootNode)
                                     ->scalarNode('type')->defaultValue('array')->end()
                                     ->scalarNode('class')->end()
                                     ->scalarNode('host')->end()
-                                    ->scalarNode('port')->end()
+                                    ->integerNode('port')->end()
                                     ->scalarNode('instance_class')->end()
                                     ->scalarNode('id')->end()
                                     ->scalarNode('namespace')->end()
@@ -208,7 +208,7 @@ private function addConnectionsSection(ArrayNodeDefinition $rootNode)
                                         ->values(array('SCRAM-SHA-1', 'MONGODB-CR', 'X509', 'PLAIN', 'GSSAPI'))
                                     ->end()
                                     ->booleanNode('connect')->end()
-                                    ->scalarNode('connectTimeoutMS')->end()
+                                    ->integerNode('connectTimeoutMS')->end()
                                     ->scalarNode('db')->end()
                                     ->booleanNode('journal')->end()
                                     ->scalarNode('password')
@@ -239,18 +239,18 @@ private function addConnectionsSection(ArrayNodeDefinition $rootNode)
                                     ->scalarNode('replicaSet')
                                         ->validate()->ifTrue(function ($v) { return !is_string($v); })->thenInvalid('The replicaSet option must be a string')->end()
                                     ->end()
-                                    ->scalarNode('socketTimeoutMS')->end()
+                                    ->integerNode('socketTimeoutMS')->end()
                                     ->booleanNode('ssl')->end()
                                     ->scalarNode('username')
                                         ->validate()->ifNull()->thenUnset()->end()
                                     ->end()
                                     ->scalarNode('w')->end()
-                                    ->scalarNode('wTimeoutMS')->end()
+                                    ->integerNode('wTimeoutMS')->end()
                                     // Deprecated options
                                     ->booleanNode('fsync')->info('Deprecated. Please use the "journal" option instead.')->end()
                                     ->booleanNode('slaveOkay')->info('Deprecated. Please use the "readPreference" option instead.')->end()
-                                    ->scalarNode('timeout')->info('Deprecated. Please use the "connectTimeoutMS" option instead.')->end()
-                                    ->scalarNode('wTimeout')->info('Deprecated. Please use the "wTimeoutMS" option instead.')->end()
+                                    ->integerNode('timeout')->info('Deprecated. Please use the "connectTimeoutMS" option instead.')->end()
+                                    ->integerNode('wTimeout')->info('Deprecated. Please use the "wTimeoutMS" option instead.')->end()
                                 ->end()
                                 ->validate()
                                     ->ifTrue(function($v) { return count($v['readPreferenceTags']) === 0; })