diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c72880..fe9f1c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+# v1.4.1
+
+- Fix deserializing nullable lists
+
 # v1.4.0
 
 - Adding UMA protocol support
diff --git a/lightspark/objects/IncomingPayment.py b/lightspark/objects/IncomingPayment.py
index 338e300..1e30734 100644
--- a/lightspark/objects/IncomingPayment.py
+++ b/lightspark/objects/IncomingPayment.py
@@ -184,5 +184,7 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> IncomingPayment:
                 lambda e: PostTransactionData_from_json(requester, e),
                 obj["incoming_payment_uma_post_transaction_data"],
             )
-        ),
+        )
+        if obj["incoming_payment_uma_post_transaction_data"]
+        else None,
     )
diff --git a/lightspark/objects/LightningTransaction.py b/lightspark/objects/LightningTransaction.py
index 04d1b2f..4013870 100644
--- a/lightspark/objects/LightningTransaction.py
+++ b/lightspark/objects/LightningTransaction.py
@@ -352,7 +352,9 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> LightningTransact
                     lambda e: PostTransactionData_from_json(requester, e),
                     obj["incoming_payment_uma_post_transaction_data"],
                 )
-            ),
+            )
+            if obj["incoming_payment_uma_post_transaction_data"]
+            else None,
         )
     if obj["__typename"] == "OutgoingPayment":
         # pylint: disable=import-outside-toplevel
@@ -393,7 +395,9 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> LightningTransact
                     lambda e: PostTransactionData_from_json(requester, e),
                     obj["outgoing_payment_uma_post_transaction_data"],
                 )
-            ),
+            )
+            if obj["outgoing_payment_uma_post_transaction_data"]
+            else None,
         )
     if obj["__typename"] == "RoutingTransaction":
         # pylint: disable=import-outside-toplevel
diff --git a/lightspark/objects/OutgoingPayment.py b/lightspark/objects/OutgoingPayment.py
index d495cf3..5a74d93 100644
--- a/lightspark/objects/OutgoingPayment.py
+++ b/lightspark/objects/OutgoingPayment.py
@@ -367,5 +367,7 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> OutgoingPayment:
                 lambda e: PostTransactionData_from_json(requester, e),
                 obj["outgoing_payment_uma_post_transaction_data"],
             )
-        ),
+        )
+        if obj["outgoing_payment_uma_post_transaction_data"]
+        else None,
     )
diff --git a/lightspark/objects/Transaction.py b/lightspark/objects/Transaction.py
index 72850e8..7b11733 100644
--- a/lightspark/objects/Transaction.py
+++ b/lightspark/objects/Transaction.py
@@ -573,7 +573,9 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> Transaction:
                     lambda e: PostTransactionData_from_json(requester, e),
                     obj["incoming_payment_uma_post_transaction_data"],
                 )
-            ),
+            )
+            if obj["incoming_payment_uma_post_transaction_data"]
+            else None,
         )
     if obj["__typename"] == "OutgoingPayment":
         # pylint: disable=import-outside-toplevel
@@ -614,7 +616,9 @@ def from_json(requester: Requester, obj: Mapping[str, Any]) -> Transaction:
                     lambda e: PostTransactionData_from_json(requester, e),
                     obj["outgoing_payment_uma_post_transaction_data"],
                 )
-            ),
+            )
+            if obj["outgoing_payment_uma_post_transaction_data"]
+            else None,
         )
     if obj["__typename"] == "RoutingTransaction":
         # pylint: disable=import-outside-toplevel
diff --git a/lightspark/version.py b/lightspark/version.py
index 3e8d9f9..bf25615 100644
--- a/lightspark/version.py
+++ b/lightspark/version.py
@@ -1 +1 @@
-__version__ = "1.4.0"
+__version__ = "1.4.1"