Example: Minor engine upgrade from 1.2.0.1 to 1.2.0.2 - Amazon Neptune
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Example: Minor engine upgrade from 1.2.0.1 to 1.2.0.2

Find the DB cluster that you want to upgrade, and the template you used to create it. For example:

Description: Base Template to create Neptune Stack with Engine Version 1.2.0.1 using custom Parameter Groups Parameters: DbInstanceType: Description: Neptune DB instance type Type: String Default: db.r5.large Resources: NeptuneDBClusterParameterGroup: Type: 'AWS::Neptune::DBClusterParameterGroup' Properties: Family: neptune1.2 Description: test-cfn-neptune-db-cluster-parameter-group-description Parameters: neptune_enable_audit_log: 0 NeptuneDBParameterGroup: Type: 'AWS::Neptune::DBParameterGroup' Properties: Family: neptune1.2 Description: test-cfn-neptune-db-parameter-group-description Parameters: neptune_query_timeout: 20000 NeptuneDBCluster: Type: 'AWS::Neptune::DBCluster' Properties: EngineVersion: 1.2.0.1 DBClusterParameterGroupName: Ref: NeptuneDBClusterParameterGroup DependsOn: - NeptuneDBClusterParameterGroup NeptuneDBInstance: Type: 'AWS::Neptune::DBInstance' Properties: DBClusterIdentifier: Ref: NeptuneDBCluster DBInstanceClass: Ref: DbInstanceType DBParameterGroupName: Ref: NeptuneDBParameterGroup DependsOn: - NeptuneDBCluster - NeptuneDBParameterGroup Outputs: DBClusterId: Description: Neptune Cluster Identifier Value: Ref: NeptuneDBCluster

Update the EngineVersion property from 1.2.0.1 to 1.2.0.2:

Description: Template to upgrade minor engine version to 1.2.0.2 Parameters: DbInstanceType: Description: Neptune DB instance type Type: String Default: db.r5.large Resources: NeptuneDBClusterParameterGroup: Type: 'AWS::Neptune::DBClusterParameterGroup' Properties: Family: neptune1.2 Description: test-cfn-neptune-db-cluster-parameter-group-description Parameters: neptune_enable_audit_log: 0 NeptuneDBParameterGroup: Type: 'AWS::Neptune::DBParameterGroup' Properties: Family: neptune1.2 Description: test-cfn-neptune-db-parameter-group-description Parameters: neptune_query_timeout: 20000 NeptuneDBCluster: Type: 'AWS::Neptune::DBCluster' Properties: EngineVersion: 1.2.0.2 DBClusterParameterGroupName: Ref: NeptuneDBClusterParameterGroup DependsOn: - NeptuneDBClusterParameterGroup NeptuneDBInstance: Type: 'AWS::Neptune::DBInstance' Properties: DBClusterIdentifier: Ref: NeptuneDBCluster DBInstanceClass: Ref: DbInstanceType DBParameterGroupName: Ref: NeptuneDBParameterGroup DependsOn: - NeptuneDBCluster - NeptuneDBParameterGroup Outputs: DBClusterId: Description: Neptune Cluster Identifier Value: Ref: NeptuneDBCluster

Now use Amazon CloudFormation to run the revised template.