diff --git a/src/main/java/io/cdap/plugin/gcp/bigquery/source/AvroBigQueryInputFormatWithScopes.java b/src/main/java/io/cdap/plugin/gcp/bigquery/source/AvroBigQueryInputFormatWithScopes.java
new file mode 100644
index 0000000000..0a0e112741
--- /dev/null
+++ b/src/main/java/io/cdap/plugin/gcp/bigquery/source/AvroBigQueryInputFormatWithScopes.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2023 Cask Data, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package io.cdap.plugin.gcp.bigquery.source;
+
+import com.google.cloud.hadoop.io.bigquery.AvroBigQueryInputFormat;
+import com.google.cloud.hadoop.io.bigquery.BigQueryFactory;
+import com.google.cloud.hadoop.io.bigquery.BigQueryHelper;
+import io.cdap.plugin.gcp.common.GCPUtils;
+import org.apache.hadoop.conf.Configuration;
+
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+
+/**
+ * Override for {@link AvroBigQueryInputFormat} with additional scopes for External tables.
+ */
+public class AvroBigQueryInputFormatWithScopes extends AvroBigQueryInputFormat {
+
+  /**
+   * Override to support additonal scopes, useful when exporting from external tables
+   *
+   * @param config Hadoop config
+   * @return BigQuery Helper instance
+   * @throws IOException on IO Error.
+   * @throws GeneralSecurityException on security exception.
+   */
+  @Override
+  protected BigQueryHelper getBigQueryHelper(Configuration config) throws GeneralSecurityException, IOException {
+    BigQueryFactory factory = new BigQueryFactoryWithScopes(GCPUtils.BIGQUERY_SCOPES);
+    return factory.getBigQueryHelper(config);
+  }
+}
diff --git a/src/main/java/io/cdap/plugin/gcp/bigquery/source/PartitionedBigQueryInputFormat.java b/src/main/java/io/cdap/plugin/gcp/bigquery/source/PartitionedBigQueryInputFormat.java
index c70e1142f9..f9a938aa4f 100644
--- a/src/main/java/io/cdap/plugin/gcp/bigquery/source/PartitionedBigQueryInputFormat.java
+++ b/src/main/java/io/cdap/plugin/gcp/bigquery/source/PartitionedBigQueryInputFormat.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright © 2023 Cask Data, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
 package io.cdap.plugin.gcp.bigquery.source;
 
 import com.google.api.services.bigquery.model.Job;
@@ -10,7 +26,6 @@
 import com.google.cloud.bigquery.TableDefinition.Type;
 import com.google.cloud.bigquery.TimePartitioning;
 import com.google.cloud.hadoop.io.bigquery.AbstractBigQueryInputFormat;
-import com.google.cloud.hadoop.io.bigquery.AvroBigQueryInputFormat;
 import com.google.cloud.hadoop.io.bigquery.AvroRecordReader;
 import com.google.cloud.hadoop.io.bigquery.BigQueryConfiguration;
 import com.google.cloud.hadoop.io.bigquery.BigQueryFactory;
@@ -51,7 +66,7 @@
 public class PartitionedBigQueryInputFormat extends AbstractBigQueryInputFormat<LongWritable, GenericData.Record> {
 
   private InputFormat<LongWritable, GenericData.Record> delegateInputFormat =
-    new AvroBigQueryInputFormat();
+    new AvroBigQueryInputFormatWithScopes();
 
   @Override
   public ExportFileFormat getExportFileFormat() {