diff --git a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_4_0/4528-oid-for-text.yaml b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_4_0/4528-oid-for-text.yaml
new file mode 100644
index 00000000000..5fcc0981953
--- /dev/null
+++ b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_4_0/4528-oid-for-text.yaml
@@ -0,0 +1,7 @@
+---
+type: fix
+issue: 4528
+title: "Three database columns have been changed from type TEXT to type OID 
+  when running in Postgres: 
+  BT2_JOB_INSTANCE.PARAMS_JSON_LOB, BT2_JOB_INSTANCE.REPORT, and BT2_WORK_CHUNK.CHUNK_DATA.
+  This prevents VACUUM erasing binary objects that are still in use."
diff --git a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
index c6335beccc0..a19232bfa0c 100644
--- a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
+++ b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
@@ -108,6 +108,18 @@ public class HapiFhirJpaMigrationTasks extends BaseMigrationTasks<VersionEnum> {
 			.online(true)
 			.withColumns("SEARCH_PID")
 			.onlyAppliesToPlatforms(NON_AUTOMATIC_FK_INDEX_PLATFORMS);
+
+		// fix Postgres clob types - that stupid oid driver problem is still there
+		// BT2_JOB_INSTANCE.PARAMS_JSON_LOB
+		version.onTable("BT2_JOB_INSTANCE")
+			.migratePostgresTextClobToBinaryClob("20230208.1", "PARAMS_JSON_LOB");
+		// BT2_JOB_INSTANCE.REPORT
+		version.onTable("BT2_JOB_INSTANCE")
+			.migratePostgresTextClobToBinaryClob("20230208.2", "REPORT");
+		// BT2_WORK_CHUNK.CHUNK_DATA
+		version.onTable("BT2_WORK_CHUNK")
+			.migratePostgresTextClobToBinaryClob("20230208.3", "CHUNK_DATA");
+
 	}
 
 	private void init620() {
diff --git a/hapi-fhir-sql-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/taskdef/ColumnTypeToDriverTypeToSqlType.java b/hapi-fhir-sql-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/taskdef/ColumnTypeToDriverTypeToSqlType.java
index 15eeb8efa28..0aa498f9f02 100644
--- a/hapi-fhir-sql-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/taskdef/ColumnTypeToDriverTypeToSqlType.java
+++ b/hapi-fhir-sql-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/taskdef/ColumnTypeToDriverTypeToSqlType.java
@@ -109,7 +109,7 @@ public final class ColumnTypeToDriverTypeToSqlType {
 		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.MARIADB_10_1, "longtext");
 		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.MYSQL_5_7, "longtext");
 		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.ORACLE_12C, "clob");
-		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.POSTGRES_9_4, "text");
+		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.POSTGRES_9_4, "oid"); // the PG driver will write oid into a `text` column
 		setColumnType(ColumnTypeEnum.CLOB, DriverTypeEnum.MSSQL_2012, "varchar(MAX)");
 	}