diff --git a/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java b/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java
index 0025d8bcde85..c37ddf26abac 100644
--- a/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java
+++ b/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java
@@ -67,12 +67,12 @@ public Schema configurationSchema() {
         .addNullableField("fetchSize", FieldType.INT16)
         .addNullableField("outputParallelization", FieldType.BOOLEAN)
         .addNullableField("autosharding", FieldType.BOOLEAN)
-        .addNullableField("maxConnections", FieldType.INT16)
-        .addNullableField("driverJars", FieldType.STRING)
         // Partitioning support. If you specify a partition column we will use that instead of
         // readQuery
         .addNullableField("partitionColumn", FieldType.STRING)
         .addNullableField("partitions", FieldType.INT16)
+        .addNullableField("maxConnections", FieldType.INT16)
+        .addNullableField("driverJars", FieldType.STRING)
         .build();
   }
 
diff --git a/sdks/python/apache_beam/io/jdbc.py b/sdks/python/apache_beam/io/jdbc.py
index 3d41544a5dad..f8f24ddeb8d2 100644
--- a/sdks/python/apache_beam/io/jdbc.py
+++ b/sdks/python/apache_beam/io/jdbc.py
@@ -120,12 +120,12 @@ def default_io_expansion_service(classpath=None):
      ('connection_init_sqls', typing.Optional[typing.List[str]]),
      ('read_query', typing.Optional[str]),
      ('write_statement', typing.Optional[str]),
-     ('fetch_size', typing.Optional[int]),
+     ('fetch_size', typing.Optional[np.int16]),
      ('output_parallelization', typing.Optional[bool]),
      ('autosharding', typing.Optional[bool]),
      ('partition_column', typing.Optional[str]),
      ('partitions', typing.Optional[np.int16]),
-     ('max_connections', typing.Optional[int]),
+     ('max_connections', typing.Optional[np.int16]),
      ('driver_jars', typing.Optional[str])],
 )