diff --git a/blockapi/v2/models.py b/blockapi/v2/models.py
index 9a69fdc..3deee92 100644
--- a/blockapi/v2/models.py
+++ b/blockapi/v2/models.py
@@ -906,12 +906,16 @@ def from_api(
         average_price: str,
     ) -> 'NftCollectionIntervalStats':
         return cls(
-            volume=Decimal(volume),
-            volume_diff=Decimal(volume_diff),
-            volume_percent_change=Decimal(volume_percent_change),
+            volume=Decimal(volume) if volume else Decimal('0'),
+            volume_diff=Decimal(volume_diff) if volume_diff else Decimal('0'),
+            volume_percent_change=(
+                Decimal(volume_percent_change)
+                if volume_percent_change
+                else Decimal('0')
+            ),
             sales_count=int(sales_count) if sales_count else 0,
             sales_diff=int(Decimal(sales_diff)) if sales_diff else 0,
-            average_price=Decimal(average_price),
+            average_price=Decimal(average_price) if average_price else Decimal('0'),
         )
 
 
diff --git a/setup.py b/setup.py
index 3e5e19b..5f4c122 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,8 @@
         'attrs>=17.4.0,<23.0.0',
         'solders>=0.22.0',
         'base58>=2.1.0',
+        # vcrpy incompatible with 3.14, remove once vcrpy>8.1.1 is out
+        'aiohttp<3.14',
     ],
     url="https://github.com/crypkit/blockapi",
 )