diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index bb0910e2..f8287d98 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,2 +1,5 @@
 # Scala Steward: Reformat with scalafmt 3.5.8
 d36e29b27d550a5498b4dc35324fb24945271f55
+
+# Scala Steward: Reformat with scalafmt 3.8.4
+d0c0f4aa2f8e08d3dd670a648e84f232b617ba97
diff --git a/.scalafmt.conf b/.scalafmt.conf
index 8ed645af..7f33a6b9 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = 3.6.1
+version = 3.8.4
 runner.dialect = scala213
 continuationIndent.defnSite = 2
 docstrings.style = Asterisk
diff --git a/benchmark/src/main/scala/org/typelevel/catbird/benchmark/RerunnableBenchmark.scala b/benchmark/src/main/scala/org/typelevel/catbird/benchmark/RerunnableBenchmark.scala
index dd9f80ae..668a4afd 100644
--- a/benchmark/src/main/scala/org/typelevel/catbird/benchmark/RerunnableBenchmark.scala
+++ b/benchmark/src/main/scala/org/typelevel/catbird/benchmark/RerunnableBenchmark.scala
@@ -6,7 +6,7 @@ import java.util.concurrent.{ ExecutorService, Executors, TimeUnit }
 import org.openjdk.jmh.annotations._
 
 /**
- * Compare the performance of `Rerunnable` against ordinary `Future`s.
+ * Compare the performance of `Rerunnable` against ordinary `Future` s.
  *
  * The following command will run the benchmarks with reasonable settings:
  *
diff --git a/benchmark/src/test/scala/org/typelevel/catbird/benchmark/RerunnableBenchmarkSpec.scala b/benchmark/src/test/scala/org/typelevel/catbird/benchmark/RerunnableBenchmarkSpec.scala
index 7a01d5af..6ac79c85 100644
--- a/benchmark/src/test/scala/org/typelevel/catbird/benchmark/RerunnableBenchmarkSpec.scala
+++ b/benchmark/src/test/scala/org/typelevel/catbird/benchmark/RerunnableBenchmarkSpec.scala
@@ -22,7 +22,6 @@ class RerunnableBenchmarkSpec extends AnyFlatSpec with BeforeAndAfter {
     assert(benchmark.sumIntsR === sum)
   }
 
-  it should "correctly calculate the sum using rerunnables and future pools" in {
+  it should "correctly calculate the sum using rerunnables and future pools" in
     assert(benchmark.sumIntsPR === sum)
-  }
 }
diff --git a/project/FinaglePlugin.scala b/project/FinaglePlugin.scala
index 950c1122..a95dbb8a 100644
--- a/project/FinaglePlugin.scala
+++ b/project/FinaglePlugin.scala
@@ -31,9 +31,8 @@ object FinaglePlugin extends AutoPlugin {
       .enablePlugins(NoPublishPlugin)
       .settings(
         libraryDependencies += module,
-        mimaCurrentClassfiles := {
-          (Compile / dependencyClasspath).value.seq.map(_.data).find(_.getName.startsWith(module.name)).get
-        },
+        mimaCurrentClassfiles :=
+          (Compile / dependencyClasspath).value.seq.map(_.data).find(_.getName.startsWith(module.name)).get,
         mimaPreviousArtifacts := versions.tail.map { v =>
           module.withRevision(v)
         }.toSet