diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 54a3a48..8839d7f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,7 +20,7 @@ jobs:
         run: python -m pip install --upgrade pip
       - name: Install cython wheel
         run: pip install cython wheel
-      - name: Install vcf2fhir
-        run: pip install vcf2fhir
+      - name: Install Dependencies
+        run: pip install -r requirements.txt
       - name: Run Unit tests
         run: python -m unittest
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..3c85e5e
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,7 @@
+Cython>=0.29.21
+fhirclient==3.2.0
+pysam
+pandas
+pytz>=2019.3
+PyVCF3>=1.0.3
+pyranges>=0.0.96
diff --git a/setup.cfg b/setup.cfg
index af49bbd..29d16bd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,7 +28,7 @@ install_requires =
     pysam
     pandas
     pytz>=2019.3
-    pyVCF>=0.6.8
+    PyVCF3>=1.0.3
     pyranges>=0.0.96
 tests_require =
     unittest
diff --git a/vcf2fhir/fhir_helper.py b/vcf2fhir/fhir_helper.py
index d8db607..28f9f10 100644
--- a/vcf2fhir/fhir_helper.py
+++ b/vcf2fhir/fhir_helper.py
@@ -82,7 +82,10 @@ def _add_phase_records(self, record):
         if(sample_data.GT is not None and
            len(sample_data.GT.split('|')) >= 2 and
            'PS' in sample_data._fields):
-            self.phased_rec_map.setdefault(sample_data.PS, []).append(record)
+            sample_data_ps = sample_data.PS
+            if isinstance(sample_data.PS, list):
+                sample_data_ps = sample_data_ps[0]
+            self.phased_rec_map.setdefault(sample_data_ps, []).append(record)
 
     def initalize_report(self):
         patient_reference = reference.FHIRReference(
@@ -266,12 +269,15 @@ def add_variant_obv(
                     "http://loinc.org", "82155-3",
                     "Genomic Structural Variant copy Number"
                 )
+                copy_number = record.samples[0]["CN"]
+                if isinstance(record.samples[0]["CN"], list):
+                    copy_number = copy_number[0]
                 copy_number_component\
                     .valueQuantity = quantity.Quantity(
                         {
                             "system": "http://unitsofmeasure.org",
                             "code": '1',
-                            "value": record.samples[0]["CN"]
+                            "value": copy_number
                         }
                     )