diff --git a/.github/workflows/recipe.yaml b/.github/workflows/recipe.yaml
index 6e2bb39e..b57c6438 100644
--- a/.github/workflows/recipe.yaml
+++ b/.github/workflows/recipe.yaml
@@ -27,11 +27,14 @@ jobs:
 
     steps:
       - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: date.timezone=UTC
+
+      - name: Set project php-version
         run: |
-          sudo update-alternatives --set php /usr/bin/php${{ matrix.php }}
-          echo "date.timezone=UTC" >> /tmp/timezone.ini
-          sudo mv /tmp/timezone.ini /etc/php/${{ matrix.php }}/cli/conf.d/timezone.ini
-          echo ${{ matrix.php }} > .php-version
+          echo "${{ matrix.php }}" > .php-version
 
       - uses: actions/checkout@v2
         with:
diff --git a/.github/workflows/security.yaml b/.github/workflows/security.yaml
index 99160cb1..0f8e85b6 100644
--- a/.github/workflows/security.yaml
+++ b/.github/workflows/security.yaml
@@ -21,9 +21,13 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: date.timezone=UTC
+
+      - name: Set project php-version
         run: |
-          sudo update-alternatives --set php /usr/bin/php${{ matrix.php }}
-          echo "date.timezone=UTC" | sudo tee /etc/php/${{ matrix.php }}/cli/conf.d/timezone.ini
           echo "${{ matrix.php }}" > .php-version
 
       - uses: actions/cache@v1
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index f266e879..14694f5f 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -28,9 +28,13 @@ jobs:
           node-version: '14'
 
       - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: date.timezone=UTC
+
+      - name: Set project php-version
         run: |
-          sudo update-alternatives --set php /usr/bin/php${{ matrix.php }}
-          echo "date.timezone=UTC" | sudo tee /etc/php/${{ matrix.php }}/cli/conf.d/timezone.ini
           echo "${{ matrix.php }}" > .php-version
 
       - name: Install symfony CLI
diff --git a/src/Normalizer/Product/ProductDTONormalizer.php b/src/Normalizer/Product/ProductDTONormalizer.php
index 479379d7..24532387 100644
--- a/src/Normalizer/Product/ProductDTONormalizer.php
+++ b/src/Normalizer/Product/ProductDTONormalizer.php
@@ -63,13 +63,13 @@ public function denormalize($data, string $type, string $format = null, array $c
         /** @var EaterInterface $object */
         $object = parent::denormalize($data, $type, $format, $context);
 
-        if (\array_key_exists('main_taxon', $data)) {
+        if (\array_key_exists('main_taxon', $data) && null !== $data['main_taxon']) {
             $taxonDTOClass = $this->automapperConfiguration->getTargetClass('taxon');
             $object->setData('main_taxon', $this->denormalizer->denormalize($data['main_taxon'], $taxonDTOClass, 'json', $context));
             unset($data['main_taxon']);
         }
 
-        if (\array_key_exists('product_taxons', $data)) {
+        if (\array_key_exists('product_taxons', $data) && null !== $data['product_taxons']) {
             $values = [];
             $productTaxonDTOClass = $this->automapperConfiguration->getTargetClass('product_taxon');
             foreach ($data['product_taxons'] as $value) {
@@ -89,7 +89,7 @@ public function denormalize($data, string $type, string $format = null, array $c
             unset($data['product_taxons']);
         }
 
-        if (\array_key_exists('channels', $data)) {
+        if (\array_key_exists('channels', $data) && null !== $data['channels']) {
             $values = [];
             $channelDTOClass = $this->automapperConfiguration->getTargetClass('channel');
             foreach ($data['channels'] as $value) {
@@ -99,7 +99,7 @@ public function denormalize($data, string $type, string $format = null, array $c
             unset($data['channels']);
         }
 
-        if (\array_key_exists('attributes', $data)) {
+        if (\array_key_exists('attributes', $data) && null !== $data['attributes']) {
             $values = [];
             $productAttributeDTOClass = $this->automapperConfiguration->getTargetClass('product_attribute');
             foreach ($data['attributes'] as $key => $value) {
@@ -109,7 +109,7 @@ public function denormalize($data, string $type, string $format = null, array $c
             unset($data['channels']);
         }
 
-        if (\array_key_exists('prices', $data)) {
+        if (\array_key_exists('prices', $data) && null !== $data['prices']) {
             $values = [];
             $pricingDTOClass = $this->automapperConfiguration->getTargetClass('pricing');
             foreach ($data['prices'] as $key => $value) {