diff --git a/phpstan.neon b/phpstan.neon
index fa39039..89ad65e 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,3 +1,3 @@
 parameters:
-    level: 6
+    level: 7
     checkMissingIterableValueType: false
diff --git a/psalm-report.json b/psalm-report.json
index 74204f4..d27f3af 100644
--- a/psalm-report.json
+++ b/psalm-report.json
@@ -23,30 +23,6 @@
             "selected_text": "$locales",
             "error_level": 6,
             "shortcode": 128
-        },
-        {
-            "severity": "error",
-            "line_from": 237,
-            "line_to": 237,
-            "type": "InvalidReturnType",
-            "message": "The declared return type 'array<array-key, Generated\\Shared\\Transfer\\LocaleTransfer>' for Spryker\\Zed\\Locale\\Business\\Manager\\LocaleManager::getAvailableLocaleCollection is incorrect, got 'array<array-key, Generated\\Shared\\Transfer\\LocaleTransfer|array-key>'",
-            "file_name": "vendor/spryker/spryker/Bundles/Locale/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php",
-            "snippet": "     * @return array<\\Generated\\Shared\\Transfer\\LocaleTransfer>",
-            "selected_text": "array<\\Generated\\Shared\\Transfer\\LocaleTransfer>",
-            "error_level": 6,
-            "shortcode": 11
-        },
-        {
-            "severity": "error",
-            "line_from": 247,
-            "line_to": 247,
-            "type": "InvalidReturnStatement",
-            "message": "The inferred type 'array<array-key, Generated\\Shared\\Transfer\\LocaleTransfer|array-key>' does not match the declared return type 'array<array-key, Generated\\Shared\\Transfer\\LocaleTransfer>' for Spryker\\Zed\\Locale\\Business\\Manager\\LocaleManager::getAvailableLocaleCollection",
-            "file_name": "vendor/spryker/spryker/Bundles/Locale/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php",
-            "snippet": "        return array_merge(array_flip($availableLocales), $indexedLocaleTransfers);",
-            "selected_text": "array_merge(array_flip($availableLocales), $indexedLocaleTransfers)",
-            "error_level": 6,
-            "shortcode": 128
         }
     ],
     "warning": [
@@ -184,8 +160,8 @@
         },
         {
             "severity": "info",
-            "line_from": 260,
-            "line_to": 260,
+            "line_from": 262,
+            "line_to": 262,
             "type": "PossiblyNullArrayOffset",
             "message": "Cannot access value on variable $indexedLocaleTransfers[null|string] using possibly null offset null|string",
             "file_name": "vendor/spryker/spryker/Bundles/Locale/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php",
@@ -199,7 +175,7 @@
             "line_from": 47,
             "line_to": 47,
             "type": "InvalidNullableReturnType",
-            "message": "The declared return type 'string' for /var/work/devvm/project/vendor/spryker/spryker/bundles/locale/src/spryker/zed/locale/communication/plugin/application/localeapplicationplugin.php:47:1540:-:closure is not nullable, but 'null|string' contains null",
+            "message": "The declared return type 'string' for /data/vendor/spryker/spryker/bundles/locale/src/spryker/zed/locale/communication/plugin/application/localeapplicationplugin.php:47:1540:-:closure is not nullable, but 'null|string' contains null",
             "file_name": "vendor/spryker/spryker/Bundles/Locale/src/Spryker/Zed/Locale/Communication/Plugin/Application/LocaleApplicationPlugin.php",
             "snippet": "        $container->set(static::SERVICE_LOCALE, function (ContainerInterface $container): string {",
             "selected_text": "string",
@@ -211,7 +187,7 @@
             "line_from": 52,
             "line_to": 52,
             "type": "NullableReturnStatement",
-            "message": "The declared return type 'string' for /var/work/devvm/project/vendor/spryker/spryker/bundles/locale/src/spryker/zed/locale/communication/plugin/application/localeapplicationplugin.php:47:1540:-:closure is not nullable, but the function returns 'null|string'",
+            "message": "The declared return type 'string' for /data/vendor/spryker/spryker/bundles/locale/src/spryker/zed/locale/communication/plugin/application/localeapplicationplugin.php:47:1540:-:closure is not nullable, but the function returns 'null|string'",
             "file_name": "vendor/spryker/spryker/Bundles/Locale/src/Spryker/Zed/Locale/Communication/Plugin/Application/LocaleApplicationPlugin.php",
             "snippet": "            return $localeTransfer->getLocaleName();",
             "selected_text": "$localeTransfer->getLocaleName()",
diff --git a/src/Spryker/Zed/Locale/Business/Internal/Install/LocaleInstaller.php b/src/Spryker/Zed/Locale/Business/Internal/Install/LocaleInstaller.php
index 7979331..4c748c7 100644
--- a/src/Spryker/Zed/Locale/Business/Internal/Install/LocaleInstaller.php
+++ b/src/Spryker/Zed/Locale/Business/Internal/Install/LocaleInstaller.php
@@ -58,10 +58,13 @@ protected function installLocales()
      */
     protected function executeInstallLocalesTransaction(): void
     {
+        /** @var resource $localeFile */
         $localeFile = fopen($this->localeFile, 'r');
 
         while (!feof($localeFile)) {
-            $locale = trim(fgets($localeFile));
+            /** @var string $locale */
+            $locale = fgets($localeFile);
+            $locale = trim($locale);
 
             $query = $this->localeQueryContainer->queryLocaleByName($locale);
 
diff --git a/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php b/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php
index b3c73d0..8fffd04 100644
--- a/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php
+++ b/src/Spryker/Zed/Locale/Business/Manager/LocaleManager.php
@@ -243,8 +243,10 @@ protected function getAvailableLocaleCollection(Store $store): array
         $localeTransfers = $this->localeRepository->getLocaleTransfersByLocaleNames($availableLocales);
 
         $indexedLocaleTransfers = $this->indexLocaleTransfersByLocalename($localeTransfers);
+        /** @var array<\Generated\Shared\Transfer\LocaleTransfer> $availableLocales */
+        $availableLocales = array_intersect_key(array_flip($availableLocales), $indexedLocaleTransfers);
 
-        return array_merge(array_flip($availableLocales), $indexedLocaleTransfers);
+        return array_merge($availableLocales, $indexedLocaleTransfers);
     }
 
     /**
diff --git a/src/Spryker/Zed/Locale/LocaleConfig.php b/src/Spryker/Zed/Locale/LocaleConfig.php
index fe0f96e..bc49981 100644
--- a/src/Spryker/Zed/Locale/LocaleConfig.php
+++ b/src/Spryker/Zed/Locale/LocaleConfig.php
@@ -18,6 +18,7 @@ class LocaleConfig extends AbstractBundleConfig
      */
     public function getLocaleFile()
     {
+        /** @phpstan-var string */
         return realpath(__DIR__ . '/Business/Internal/Install/locales.txt');
     }
 }
diff --git a/tests/SprykerTest/Zed/Locale/Business/LocaleFacadeTest.php b/tests/SprykerTest/Zed/Locale/Business/LocaleFacadeTest.php
index 7e45542..9c7b010 100644
--- a/tests/SprykerTest/Zed/Locale/Business/LocaleFacadeTest.php
+++ b/tests/SprykerTest/Zed/Locale/Business/LocaleFacadeTest.php
@@ -46,6 +46,11 @@ class LocaleFacadeTest extends Unit
      */
     protected $localeNames = [];
 
+    /**
+     * @var \SprykerTest\Zed\Locale\LocaleBusinessTester
+     */
+    protected $tester;
+
     /**
      * @return void
      */
@@ -105,4 +110,17 @@ public function testCurrentLocaleIsChangeable(): void
         //Assert
         $this->assertSame($currentLocale->getLocaleName(), $newCurrentLocale->getLocaleName());
     }
+
+    /**
+     * @return void
+     */
+    public function testGetLocaleCollectionGetsLocalesFromStoreInstance(): void
+    {
+        // Act
+        $localeTransfers = $this->localeFacade->getLocaleCollection();
+
+        // Assert
+        $this->assertSame('en_US', array_keys($localeTransfers)[0]);
+        $this->assertSame('de_DE', array_keys($localeTransfers)[1]);
+    }
 }