diff --git a/.editorconfig b/.editorconfig
index fc0fba97..16a2af5c 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -8,4 +8,6 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.{kt,kts}]
-kotlin_imports_layout = ascii
+ij_kotlin_allow_trailing_comma = true
+ij_kotlin_allow_trailing_comma_on_call_site = true
+ij_kotlin_imports_layout = *
diff --git a/build.gradle b/build.gradle
index 159eecb3..aaf8f409 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
   dependencies {
     classpath deps.kotlinGradlePlugin
     classpath "org.jetbrains.kotlin:kotlin-serialization:${versions.kotlin}"
-    classpath 'com.diffplug.spotless:spotless-plugin-gradle:5.1.0'
+    classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.8.0'
     classpath 'com.vanniktech:gradle-maven-publish-plugin:0.14.2'
     classpath 'org.jetbrains.dokka:dokka-gradle-plugin:1.7.0'
     classpath 'de.undercouch:gradle-download-task:5.1.0'
@@ -132,10 +132,13 @@ spotless {
     target('**/*.kt')
     licenseHeaderFile(rootProject.file('gradle/license-header.txt'))
     // Spotless doesn't read .editorconfig yet: https://github.com/diffplug/spotless/issues/142
-    ktlint('0.41.0').userData([
-      'insert_final_newline': 'true',
+    ktlint('0.46.1').editorConfigOverride([
+      'disabled_rules': 'filename',
       'end_of_line': 'lf',
       'indent_size': '2',
+      'ij_kotlin_allow_trailing_comma': 'true',
+      'ij_kotlin_allow_trailing_comma_on_call_site': 'true',
+      'ij_kotlin_imports_layout': '*',
     ])
   }
 }
diff --git a/src/main/kotlin/app/cash/licensee/dependencyGraph.kt b/src/main/kotlin/app/cash/licensee/dependencyGraph.kt
index ea75f41f..c0f99787 100644
--- a/src/main/kotlin/app/cash/licensee/dependencyGraph.kt
+++ b/src/main/kotlin/app/cash/licensee/dependencyGraph.kt
@@ -15,6 +15,9 @@
  */
 package app.cash.licensee
 
+import java.io.File
+import java.io.Serializable
+import javax.xml.parsers.DocumentBuilderFactory
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Dependency
 import org.gradle.api.artifacts.LenientConfiguration
@@ -28,9 +31,6 @@ import org.gradle.api.attributes.Attribute
 import org.gradle.api.logging.Logger
 import org.w3c.dom.Node
 import org.w3c.dom.NodeList
-import java.io.File
-import java.io.Serializable
-import javax.xml.parsers.DocumentBuilderFactory
 
 internal data class DependencyConfig(
   val ignoredGroupIds: Map<String, IgnoredData>,
@@ -139,7 +139,7 @@ private fun loadDependencyCoordinates(
         if (ignoreSuffix != null) {
           append(ignoreSuffix)
         }
-      }
+      },
     )
   }
 
@@ -149,7 +149,14 @@ private fun loadDependencyCoordinates(
         val selected = dependency.selected
         if (seen.add(selected.id)) {
           loadDependencyCoordinates(
-            logger, selected, config, unusedGroupIds, unusedCoordinates, destination, seen, depth + 1
+            logger,
+            selected,
+            config,
+            unusedGroupIds,
+            unusedCoordinates,
+            destination,
+            seen,
+            depth + 1,
           )
         }
       }
@@ -299,7 +306,7 @@ internal fun loadPomInfo(
         logger = logger,
         id = DependencyCoordinates(group, artifact, version),
         variants = variants,
-        depth = depth + 1
+        depth = depth + 1,
       )
       if (licenses.isEmpty()) {
         licenses += parentPomInfo.licenses
diff --git a/src/main/kotlin/app/cash/licensee/licenseValidation.kt b/src/main/kotlin/app/cash/licensee/licenseValidation.kt
index 908dbea5..732469de 100644
--- a/src/main/kotlin/app/cash/licensee/licenseValidation.kt
+++ b/src/main/kotlin/app/cash/licensee/licenseValidation.kt
@@ -54,7 +54,7 @@ internal fun validateArtifacts(
       if (spdxLicense.identifier in validationConfig.allowedIdentifiers) {
         unusedAllowedIdentifiers -= spdxLicense.identifier
         artifactResults += ValidationResult.Info(
-          "SPDX identifier '${spdxLicense.identifier}' allowed"
+          "SPDX identifier '${spdxLicense.identifier}' allowed",
         )
         validated = true
         break
@@ -62,7 +62,7 @@ internal fun validateArtifacts(
       if (spdxLicense.url in validationConfig.allowedUrls) {
         unusedAllowedUrls -= spdxLicense.url
         artifactResults += ValidationResult.Warning(
-          "License URL '${spdxLicense.url}' was allowed but could use SPDX identifier '${spdxLicense.identifier}'"
+          "License URL '${spdxLicense.url}' was allowed but could use SPDX identifier '${spdxLicense.identifier}'",
         )
         validated = true
         break
@@ -83,7 +83,7 @@ internal fun validateArtifacts(
     if (!validated) {
       for (spdxLicense in artifact.spdxLicenses) {
         artifactResults += ValidationResult.Error(
-          "SPDX identifier '${spdxLicense.identifier}' is NOT allowed"
+          "SPDX identifier '${spdxLicense.identifier}' is NOT allowed",
         )
       }
       for (unknownLicense in artifact.unknownLicenses) {
@@ -92,7 +92,7 @@ internal fun validateArtifacts(
             "Unknown license name '${unknownLicense.name}' with no URL is NOT allowed"
           } else {
             "Unknown license URL '${unknownLicense.url}' is NOT allowed"
-          }
+          },
         )
       }
       if (artifact.spdxLicenses.isEmpty() && artifact.unknownLicenses.isEmpty()) {
@@ -113,7 +113,7 @@ internal fun validateArtifacts(
               append(" because ")
               append(reason)
             }
-          }
+          },
         )
 
         // Downgrade errors to info.
@@ -127,7 +127,7 @@ internal fun validateArtifacts(
           .firstOrNull { it.group == artifact.groupId && it.artifact == artifact.artifactId }
         if (candidate != null) {
           artifactResults += ValidationResult.Warning(
-            "Coordinates match an allowed dependency but version does not match (${candidate.version} != ${artifact.version})"
+            "Coordinates match an allowed dependency but version does not match (${candidate.version} != ${artifact.version})",
           )
         }
       }
diff --git a/src/main/kotlin/app/cash/licensee/licenses.kt b/src/main/kotlin/app/cash/licensee/licenses.kt
index 46fab1fc..0f059426 100644
--- a/src/main/kotlin/app/cash/licensee/licenses.kt
+++ b/src/main/kotlin/app/cash/licensee/licenses.kt
@@ -38,7 +38,7 @@ internal fun normalizeLicenseInfo(
       pomInfo.name,
       spdxLicenses,
       unknownLicenses,
-      pomInfo.scm?.url?.let(::ArtifactScm)
+      pomInfo.scm?.url?.let(::ArtifactScm),
     )
   }
 
diff --git a/src/main/kotlin/app/cash/licensee/licensesSpdx.kt b/src/main/kotlin/app/cash/licensee/licensesSpdx.kt
index 4ddd0155..8c54846b 100644
--- a/src/main/kotlin/app/cash/licensee/licensesSpdx.kt
+++ b/src/main/kotlin/app/cash/licensee/licensesSpdx.kt
@@ -15,10 +15,10 @@
  */
 package app.cash.licensee
 
+import kotlin.LazyThreadSafetyMode.PUBLICATION
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
-import kotlin.LazyThreadSafetyMode.PUBLICATION
 
 internal class SpdxLicenses(
   private val identifierToLicense: Map<String, SpdxLicense>,
diff --git a/src/main/kotlin/app/cash/licensee/plugin.kt b/src/main/kotlin/app/cash/licensee/plugin.kt
index efcbd48c..2738e102 100644
--- a/src/main/kotlin/app/cash/licensee/plugin.kt
+++ b/src/main/kotlin/app/cash/licensee/plugin.kt
@@ -18,6 +18,8 @@ package app.cash.licensee
 import com.android.build.gradle.AppExtension
 import com.android.build.gradle.LibraryExtension
 import com.android.build.gradle.internal.publishing.AndroidArtifacts.ArtifactType.CLASSES
+import java.io.File
+import java.util.Locale.ROOT
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.Task
@@ -28,8 +30,6 @@ import org.gradle.api.tasks.TaskProvider
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType.androidJvm
 import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType.common
-import java.io.File
-import java.util.Locale.ROOT
 
 private const val baseTaskName = "licensee"
 private const val reportFolder = "licensee"
@@ -75,7 +75,7 @@ class LicenseePlugin : Plugin<Project> {
           "project ${project.path}"
         }
         throw IllegalStateException(
-          "'app.cash.licensee' requires compatible language/platform plugin to be applied ($name)"
+          "'app.cash.licensee' requires compatible language/platform plugin to be applied ($name)",
         )
       }
 
diff --git a/src/main/kotlin/app/cash/licensee/pluginExtension.kt b/src/main/kotlin/app/cash/licensee/pluginExtension.kt
index b4225819..7e1e4905 100644
--- a/src/main/kotlin/app/cash/licensee/pluginExtension.kt
+++ b/src/main/kotlin/app/cash/licensee/pluginExtension.kt
@@ -245,11 +245,13 @@ internal class MutableLicenseeExtension : LicenseeExtension {
     options: Action<AllowDependencyOptions>,
   ) {
     var setReason: String? = null
-    options.execute(object : AllowDependencyOptions {
-      override fun because(reason: String) {
-        setReason = reason
-      }
-    })
+    options.execute(
+      object : AllowDependencyOptions {
+        override fun because(reason: String) {
+          setReason = reason
+        }
+      },
+    )
     allowedDependencies[DependencyCoordinates(groupId, artifactId, version)] = setReason
   }
 
@@ -260,17 +262,19 @@ internal class MutableLicenseeExtension : LicenseeExtension {
   ) {
     var setReason: String? = null
     var setTransitive = false
-    options.execute(object : IgnoreDependencyOptions {
-      override fun because(reason: String) {
-        setReason = reason
-      }
-
-      override var transitive: Boolean
-        get() = setTransitive
-        set(value) {
-          setTransitive = value
+    options.execute(
+      object : IgnoreDependencyOptions {
+        override fun because(reason: String) {
+          setReason = reason
         }
-    })
+
+        override var transitive: Boolean
+          get() = setTransitive
+          set(value) {
+            setTransitive = value
+          }
+      },
+    )
 
     if (setTransitive && setReason == null) {
       throw RuntimeException(
@@ -282,7 +286,7 @@ internal class MutableLicenseeExtension : LicenseeExtension {
             append(artifactId)
           }
           append("' is dangerous and requires a reason string")
-        }
+        },
       )
     }
 
diff --git a/src/main/kotlin/app/cash/licensee/task.kt b/src/main/kotlin/app/cash/licensee/task.kt
index d088ab8f..e898b6e2 100644
--- a/src/main/kotlin/app/cash/licensee/task.kt
+++ b/src/main/kotlin/app/cash/licensee/task.kt
@@ -17,6 +17,8 @@ package app.cash.licensee
 
 import app.cash.licensee.ViolationAction.FAIL
 import app.cash.licensee.ViolationAction.IGNORE
+import java.io.File
+import kotlin.properties.Delegates
 import kotlinx.serialization.builtins.ListSerializer
 import kotlinx.serialization.json.Json
 import org.gradle.api.DefaultTask
@@ -35,8 +37,6 @@ import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.Internal
 import org.gradle.api.tasks.OutputDirectory
 import org.gradle.api.tasks.TaskAction
-import java.io.File
-import kotlin.properties.Delegates
 
 internal open class LicenseeTask : DefaultTask() {
   @get:Input
@@ -96,7 +96,7 @@ internal open class LicenseeTask : DefaultTask() {
                 append(" because ")
                 append(ignoreData.reason)
               }
-            }
+            },
           )
         }
         for ((groupId, artifactIds) in dependencyConfig.ignoredCoordinates) {
@@ -114,7 +114,7 @@ internal open class LicenseeTask : DefaultTask() {
                   append(" because ")
                   append(ignoreData.reason)
                 }
-              }
+              },
             )
           }
         }
@@ -155,7 +155,7 @@ internal open class LicenseeTask : DefaultTask() {
             append(artifactDetail.spdxLicenses)
             append(' ')
             append(artifactDetail.unknownLicenses)
-          }
+          },
         )
       }
     }
@@ -176,7 +176,7 @@ internal open class LicenseeTask : DefaultTask() {
       logger.info("")
       logger.info("Allowed identifiers:")
       logger.info(
-        validationConfig.allowedIdentifiers.ifEmpty { listOf("None") }.joinToString(prefix = "  ")
+        validationConfig.allowedIdentifiers.ifEmpty { listOf("None") }.joinToString(prefix = "  "),
       )
       logger.info("Allowed URLs:")
       if (validationConfig.allowedUrls.isEmpty()) {
@@ -203,7 +203,7 @@ internal open class LicenseeTask : DefaultTask() {
                 append(" because ")
                 append(reason)
               }
-            }
+            },
           )
         }
       }
diff --git a/src/test/kotlin/app/cash/licensee/LicenseePluginFixtureTest.kt b/src/test/kotlin/app/cash/licensee/LicenseePluginFixtureTest.kt
index 540321bf..0c8fe301 100644
--- a/src/test/kotlin/app/cash/licensee/LicenseePluginFixtureTest.kt
+++ b/src/test/kotlin/app/cash/licensee/LicenseePluginFixtureTest.kt
@@ -18,12 +18,12 @@ package app.cash.licensee
 import com.google.common.truth.Truth.assertThat
 import com.google.testing.junit.testparameterinjector.TestParameter
 import com.google.testing.junit.testparameterinjector.TestParameterInjector
+import java.io.File
 import org.gradle.testkit.runner.GradleRunner
 import org.gradle.testkit.runner.TaskOutcome.UP_TO_DATE
 import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.junit.runner.RunWith
-import java.io.File
 
 @RunWith(TestParameterInjector::class)
 class LicenseePluginFixtureTest {
@@ -145,7 +145,7 @@ class LicenseePluginFixtureTest {
     val fixtureDir = File(fixturesDir, fixtureName)
     val result = createRunner(fixtureDir).buildAndFail()
     assertThat(result.output).containsMatch(
-      "Transitive dependency ignore on 'com\\.example(:example)?' is dangerous and requires a reason string"
+      "Transitive dependency ignore on 'com\\.example(:example)?' is dangerous and requires a reason string",
     )
   }
 
@@ -155,7 +155,7 @@ class LicenseePluginFixtureTest {
     val fixtureDir = File(fixturesDir, fixtureName)
     val result = createRunner(fixtureDir).buildAndFail()
     assertThat(result.output).contains(
-      "'app.cash.licensee' requires compatible language/platform plugin to be applied (root project)"
+      "'app.cash.licensee' requires compatible language/platform plugin to be applied (root project)",
     )
   }
 
@@ -165,7 +165,7 @@ class LicenseePluginFixtureTest {
     val fixtureDir = File(fixturesDir, fixtureName)
     val result = createRunner(fixtureDir).buildAndFail()
     assertThat(result.output).contains(
-      "'app.cash.licensee' requires compatible language/platform plugin to be applied (project :some:thing)"
+      "'app.cash.licensee' requires compatible language/platform plugin to be applied (project :some:thing)",
     )
   }
 
@@ -182,7 +182,8 @@ class LicenseePluginFixtureTest {
       """
       |com.example:example:1.0.0
       | - ERROR: SPDX identifier 'Apache-2.0' is NOT allowed
-      |""".trimMargin()
+      |
+      """.trimMargin(),
     )
   }
 
@@ -199,7 +200,8 @@ class LicenseePluginFixtureTest {
       """
       |com.example:example:1.0.0
       | - ERROR: SPDX identifier 'Apache-2.0' is NOT allowed
-      |""".trimMargin()
+      |
+      """.trimMargin(),
     )
   }
 
diff --git a/src/test/kotlin/app/cash/licensee/SpdxLicensesTest.kt b/src/test/kotlin/app/cash/licensee/SpdxLicensesTest.kt
index bd8dd3d1..90177bfa 100644
--- a/src/test/kotlin/app/cash/licensee/SpdxLicensesTest.kt
+++ b/src/test/kotlin/app/cash/licensee/SpdxLicensesTest.kt
@@ -23,7 +23,7 @@ class SpdxLicensesTest {
   @Test fun embeddedDatabaseLitmusTest() {
     assertEquals(
       SpdxLicense("MIT-0", "MIT No Attribution", "https://github.com/aws/mit-0"),
-      SpdxLicenses.embedded.findByIdentifier("MIT-0")
+      SpdxLicenses.embedded.findByIdentifier("MIT-0"),
     )
   }
 
@@ -63,15 +63,16 @@ class SpdxLicensesTest {
       |    ]
       |  }
       |]}
-      |""".trimMargin()
+      |
+    """.trimMargin()
     val spdxLicenses = SpdxLicenses.parseJson(json)
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://example.com/foo"),
-      spdxLicenses.findByUrl("http://example.com/foo")
+      spdxLicenses.findByUrl("http://example.com/foo"),
     )
     assertEquals(
       SpdxLicense("BAR-1.0", "Bar License", "https://example.com/bar"),
-      spdxLicenses.findByUrl("http://example.com/bar")
+      spdxLicenses.findByUrl("http://example.com/bar"),
     )
   }
 
@@ -95,20 +96,21 @@ class SpdxLicensesTest {
       |    ]
       |  }
       |]}
-      |""".trimMargin()
+      |
+    """.trimMargin()
     val spdxLicenses = SpdxLicenses.parseJson(json)
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://example.com/foo"),
-      spdxLicenses.findByUrl("http://example.com/foo")
+      spdxLicenses.findByUrl("http://example.com/foo"),
     )
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://example.com/foo"),
-      spdxLicenses.findByUrl("https://example.com/foo")
+      spdxLicenses.findByUrl("https://example.com/foo"),
     )
     assertNull(spdxLicenses.findByUrl("http://example.com/bar"))
     assertEquals(
       SpdxLicense("BAR-1.0", "Bar License", "https://example.com/bar"),
-      spdxLicenses.findByUrl("https://example.com/bar")
+      spdxLicenses.findByUrl("https://example.com/bar"),
     )
   }
 
@@ -124,15 +126,16 @@ class SpdxLicensesTest {
       |    ]
       |  }
       |]}
-      |""".trimMargin()
+      |
+    """.trimMargin()
     val spdxLicenses = SpdxLicenses.parseJson(json)
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://example.com/foo"),
-      spdxLicenses.findByUrl("http://example.com/foo")
+      spdxLicenses.findByUrl("http://example.com/foo"),
     )
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://example.com/foo"),
-      spdxLicenses.findByUrl("https://spdx.org/licenses/FOO-1.0.html")
+      spdxLicenses.findByUrl("https://spdx.org/licenses/FOO-1.0.html"),
     )
   }
 
@@ -154,15 +157,16 @@ class SpdxLicensesTest {
       |    ]
       |  }
       |]}
-      |""".trimMargin()
+      |
+    """.trimMargin()
     val spdxLicenses = SpdxLicenses.parseJson(json)
     assertEquals(
       SpdxLicense("FOO-1.0", "Foo License", "https://spdx.org/licenses/FOO-1.0.html"),
-      spdxLicenses.findByIdentifier("FOO-1.0")
+      spdxLicenses.findByIdentifier("FOO-1.0"),
     )
     assertEquals(
       SpdxLicense("BAR-1.0", "Bar License", "https://example.com/bar"),
-      spdxLicenses.findByIdentifier("BAR-1.0")
+      spdxLicenses.findByIdentifier("BAR-1.0"),
     )
   }
 }