diff --git a/build.gradle b/build.gradle
index 3619d101dc..44c317fea8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ buildscript {
       'assertj': '1.7.0',
       'shadowPlugin': '4.0.4',
       'nodePlugin': '1.2.0',
-      'ktlintPlugin': '5.1.0',
+      'ktlintPlugin': '7.1.0',
   ]
 
   ext.deps = [
@@ -43,7 +43,7 @@ buildscript {
       'dokka': "org.jetbrains.dokka:dokka-gradle-plugin:${versions.dokka}",
       'shadow': "com.github.jengelman.gradle.plugins:shadow:${versions.shadowPlugin}",
       'node': "com.moowork.gradle:gradle-node-plugin:${versions.nodePlugin}",
-      'ktlint': "gradle.plugin.org.jlleitschuh.gradle:ktlint-gradle:${versions.ktlintPlugin}",
+      'ktlint': "org.jlleitschuh.gradle:ktlint-gradle:${versions.ktlintPlugin}",
       'test': [
           'junit': "junit:junit:${versions.junit}",
           'assertj': "org.assertj:assertj-core:${versions.assertj}",
diff --git a/okio/jvm/src/main/java/okio/-Unsigned.kt b/samples/src/main/java/okio/samples/-Unsigned.kt
similarity index 99%
rename from okio/jvm/src/main/java/okio/-Unsigned.kt
rename to samples/src/main/java/okio/samples/-Unsigned.kt
index 9a12909958..f9e81aaf1b 100644
--- a/okio/jvm/src/main/java/okio/-Unsigned.kt
+++ b/samples/src/main/java/okio/samples/-Unsigned.kt
@@ -17,8 +17,11 @@
 @file:JvmName("-Unsigned")
 @file:Suppress("NOTHING_TO_INLINE") // Syntactic sugar.
 
-package okio
+package okio.samples
 
+import okio.BufferedSink
+import okio.BufferedSource
+import okio.JvmName
 import java.io.IOException
 
 /** Writes a unsigned byte to this sink. */
diff --git a/okio/jvm/src/test/java/okio/UnsignedTest.kt b/samples/src/test/java/okio/samples/UnsignedTest.kt
similarity index 99%
rename from okio/jvm/src/test/java/okio/UnsignedTest.kt
rename to samples/src/test/java/okio/samples/UnsignedTest.kt
index 621ea777b7..6d4ad4a06c 100644
--- a/okio/jvm/src/test/java/okio/UnsignedTest.kt
+++ b/samples/src/test/java/okio/samples/UnsignedTest.kt
@@ -16,8 +16,9 @@
 
 @file:UseExperimental(ExperimentalUnsignedTypes::class)
 
-package okio
+package okio.samples
 
+import okio.Buffer
 import org.junit.Test
 import kotlin.test.assertEquals