diff --git a/.scala-steward.conf b/.scala-steward.conf
index c7d2bf3..01e2e8f 100644
--- a/.scala-steward.conf
+++ b/.scala-steward.conf
@@ -1,7 +1,6 @@
 updates.fileExtensions = [
   "build.sbt",
-  "src/main/g8/build.sbt",
-  "mill/build.sc",
+  "src/main/g8/$if(mill.truthy)$.$endif$/build.sc",
+  "src/main/g8/$if(sbt.truthy)$.$endif$/build.sbt",
   "src/main/g8/smithy-build.json",
-  "mill/smithy-build.json"
 ]
diff --git a/build.sbt b/build.sbt
index ef1a550..a58e9a5 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,5 +1,6 @@
 lazy val root = (project in file("."))
   .enablePlugins(ScriptedPlugin)
+  .settings(phantomDeps)
   .settings(
     name := "smithy4s.g8",
     Test / test := {
@@ -13,3 +14,11 @@ lazy val root = (project in file("."))
       "-Dfile.encoding=UTF-8"
     )
   )
+
+// https://github.com/scala-steward-org/scala-steward/issues/1286#issuecomment-582083463
+// ensuring deps are updated inside of templates files
+lazy val phantomDeps = Def.settings(
+  libraryDependencies ++= Seq(
+    "org.http4s" %% "http4s-ember-server" % "0.23.16"
+  )
+)