diff --git a/debezium-connector-mongodb/src/main/java/io/debezium/connector/mongodb/MongoDbConnectorConfig.java b/debezium-connector-mongodb/src/main/java/io/debezium/connector/mongodb/MongoDbConnectorConfig.java
index 38b4c11d1..2730000cc 100644
--- a/debezium-connector-mongodb/src/main/java/io/debezium/connector/mongodb/MongoDbConnectorConfig.java
+++ b/debezium-connector-mongodb/src/main/java/io/debezium/connector/mongodb/MongoDbConnectorConfig.java
@@ -300,7 +300,7 @@ public static SnapshotMode parse(String value, String defaultValue) {
                                                             .withImportance(Importance.MEDIUM)
                                                             .withDescription("The maximum number of documents that should be loaded into memory while performing a snapshot")
                                                             .withDefault(0)
-                                                            .withValidation(Field::isPositiveInteger);
+                                                            .withValidation(Field::isNonNegativeInteger);
 
     protected static final Field TASK_ID = Field.create("mongodb.task.id")
                                                 .withDescription("Internal use only")