diff --git a/src/entity/brilink_balance_mutations.ts b/src/entity/brilink_balance_mutations.ts
index b5853cc..b00a012 100644
--- a/src/entity/brilink_balance_mutations.ts
+++ b/src/entity/brilink_balance_mutations.ts
@@ -76,7 +76,7 @@ export class BrilinkBalanceMutation {
 
     @Column({
         type: 'float8',
-        nullable: false,
+        nullable: true,
     })
     prev_balance: number;
 
@@ -88,7 +88,7 @@ export class BrilinkBalanceMutation {
 
     @Column({
         type: 'float8',
-        nullable: false,
+        nullable: true,
     })
     last_balance: number;