diff --git a/build.sbt b/build.sbt
index c042d41..29c02ec 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,8 +17,8 @@
   .enablePlugins(ScriptedPlugin)
   .settings(
     name := "daffodil-schema.g8",
-    scalaVersion := "2.12.15",
-    crossScalaVersions := Seq("2.12.15"),
+    scalaVersion := "2.12.19",
+    crossScalaVersions := Seq("2.12.19"),
     Test / test := {
       val _ = (Test / g8Test).toTask("").value
     },
diff --git a/project/build.properties b/project/build.properties
index e7ff87f..36f0e34 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-sbt.version=1.6.2
+sbt.version=1.9.9
diff --git a/src/main/g8/build.sbt b/src/main/g8/build.sbt
index 32dd11c..3777bdc 100644
--- a/src/main/g8/build.sbt
+++ b/src/main/g8/build.sbt
@@ -20,29 +20,9 @@
 
 version := "0.1.0-SNAPSHOT"
 
-scalaVersion := "2.12.15"
+scalaVersion := "2.12.19"
 
-libraryDependencies ++= Seq(
-  "com.github.sbt" % "junit-interface" % "0.13.2" % "test",
-  "junit" % "junit" % "4.13.2" % "test",
-  "org.apache.daffodil" %% "daffodil-tdml-processor" % "$daffodil_version$" % "test",
-  "org.apache.logging.log4j" % "log4j-core" % "2.17.1" % "test",
-)
+// for details about DaffodilPlugin settings, see https://github.com/apache/daffodil-sbt
+enablePlugins(DaffodilPlugin)
 
-testOptions += Tests.Argument(TestFrameworks.JUnit, "-v")
-
-crossPaths := false
-
-$if(!namespaced.truthy)$
-// Use flat folder structure. This means *.java and *.scala files are in the
-// same directory as resources files, and source/resource files are only
-// differentiated by their file extension.
-Compile / unmanagedSourceDirectories := Seq(baseDirectory.value / "src")
-Compile / unmanagedResourceDirectories := Seq(baseDirectory.value / "src")
-Compile / unmanagedSources / includeFilter := "*.java" | "*.scala"
-Compile / unmanagedResources / excludeFilter := "*.java" | "*.scala"
-Test / unmanagedSourceDirectories := Seq(baseDirectory.value / "test")
-Test / unmanagedResourceDirectories := Seq(baseDirectory.value / "test")
-Test / unmanagedSources / includeFilter := "*.java" | "*.scala"
-Test / unmanagedResources / excludeFilter := "*.java" | "*.scala"
-$endif$
+$if(!namespaced.truthy)$daffodilFlatLayout := true$endif$
diff --git a/src/main/g8/default.properties b/src/main/g8/default.properties
index 002ef3f..efc329e 100644
--- a/src/main/g8/default.properties
+++ b/src/main/g8/default.properties
@@ -16,5 +16,5 @@
 name=format
 extension=dat
 package=com.example
-namespaced=no
-daffodil_version=maven(org.apache.daffodil, daffodil-tdml-processor_2.12)
+namespaced=yes
+daffodil_plugin_version=maven(org.apache.daffodil, sbt-daffodil)
diff --git a/src/main/g8/project/build.properties b/src/main/g8/project/build.properties
index f00b8c9..c3f8670 100644
--- a/src/main/g8/project/build.properties
+++ b/src/main/g8/project/build.properties
@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 !$
-sbt.version=1.6.2
+sbt.version=1.9.9
diff --git a/src/main/g8/project/plugins.sbt b/src/main/g8/project/plugins.sbt
new file mode 100644
index 0000000..e61f357
--- /dev/null
+++ b/src/main/g8/project/plugins.sbt
@@ -0,0 +1,17 @@
+$!
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+!$
+addSbtPlugin("org.apache.daffodil" % "sbt-daffodil" % "$daffodil_plugin_version$")