diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index c2f5045e86..2e892c236e 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -76,4 +76,3 @@ mockito = { module = "org.mockito:mockito-core", version = "3.5.10" }
 mockitoKotlin = { module = "com.nhaarman.mockitokotlin2:mockito-kotlin", version = "2.2.0" }
 robolectric = { module = "org.robolectric:robolectric", version = "4.0-alpha-3" }
 okio2 = { module = "com.squareup.okio:okio", version = "2.2.2" }
-okio1 = { module = "com.squareup.okio:okio", version = "1.14.0" }
diff --git a/shark/shark-graph/src/main/java/shark/HeapObject.kt b/shark/shark-graph/src/main/java/shark/HeapObject.kt
index 8551c988ab..a8fa60fc96 100644
--- a/shark/shark-graph/src/main/java/shark/HeapObject.kt
+++ b/shark/shark-graph/src/main/java/shark/HeapObject.kt
@@ -623,7 +623,7 @@ sealed class HeapObject {
      * The name of the class of this array, identical to [Class.getName].
      */
     val arrayClassName: String
-      get() = "${primitiveType.name.toLowerCase(Locale.US)}[]"
+      get() = "${primitiveType.name.lowercase(Locale.US)}[]"
 
     /**
      * The class of this array.
@@ -651,7 +651,7 @@ sealed class HeapObject {
   companion object {
 
     internal val primitiveTypesByPrimitiveArrayClassName =
-      PrimitiveType.values().associateBy { "${it.name.toLowerCase(Locale.US)}[]" }
+      PrimitiveType.values().associateBy { "${it.name.lowercase(Locale.US)}[]" }
 
     private val primitiveWrapperClassNames = setOf<String>(
       Boolean::class.javaObjectType.name, Char::class.javaObjectType.name,
diff --git a/shark/shark-hprof/build.gradle.kts b/shark/shark-hprof/build.gradle.kts
index 765ce9f8c4..544612aa01 100644
--- a/shark/shark-hprof/build.gradle.kts
+++ b/shark/shark-hprof/build.gradle.kts
@@ -14,12 +14,9 @@ dependencies {
   implementation(libs.kotlin.stdlib)
   // compileOnly ensures this dependency is not exposed through this artifact's pom.xml in Maven Central.
   // Okio is a required dependency, but we're making it required on the "shark" artifact which is the main artifact that
-  // should generally be used. The shark artifact depends on Okio 2.x (ensure compatibility with modern Okio). Depending on 1.x here
-  // enables us to ensure binary compatibility with Okio 1.x and allow us to use the deprecated (error level) Okio APIs to keep that
-  // compatibility.
-  // See https://github.com/square/leakcanary/issues/1624
-  compileOnly(libs.okio1)
-  testImplementation(libs.okio1)
+  // should generally be used. The shark artifact depends on Okio 2.x (ensure compatibility with modern Okio).
+  compileOnly(libs.okio2)
+  testImplementation(libs.okio2)
 
   testImplementation(libs.assertjCore)
   testImplementation(libs.junit)
diff --git a/shark/shark-hprof/src/main/java/shark/FileSourceProvider.kt b/shark/shark-hprof/src/main/java/shark/FileSourceProvider.kt
index f558c202c7..0d047e0a61 100644
--- a/shark/shark-hprof/src/main/java/shark/FileSourceProvider.kt
+++ b/shark/shark-hprof/src/main/java/shark/FileSourceProvider.kt
@@ -5,10 +5,11 @@ import java.io.RandomAccessFile
 import kotlin.math.min
 import okio.Buffer
 import okio.BufferedSource
-import okio.Okio
+import okio.buffer
+import okio.source
 
 class FileSourceProvider(private val file: File) : DualSourceProvider {
-  override fun openStreamingSource(): BufferedSource = Okio.buffer(Okio.source(file.inputStream()))
+  override fun openStreamingSource(): BufferedSource = file.inputStream().source().buffer()
 
   override fun openRandomAccessSource(): RandomAccessSource {
 
diff --git a/shark/shark-hprof/src/main/java/shark/HprofHeader.kt b/shark/shark-hprof/src/main/java/shark/HprofHeader.kt
index 56d531f84b..ed1704961a 100644
--- a/shark/shark-hprof/src/main/java/shark/HprofHeader.kt
+++ b/shark/shark-hprof/src/main/java/shark/HprofHeader.kt
@@ -1,7 +1,8 @@
 package shark
 
 import okio.BufferedSource
-import okio.Okio
+import okio.buffer
+import okio.source
 import java.io.File
 
 /**
@@ -37,7 +38,7 @@ data class HprofHeader(
       if (fileLength == 0L) {
         throw IllegalArgumentException("Hprof file is 0 byte length")
       }
-      return Okio.buffer(Okio.source(hprofFile.inputStream())).use {
+      return hprofFile.inputStream().source().buffer().use {
         parseHeaderOf(it)
       }
     }
diff --git a/shark/shark-hprof/src/main/java/shark/HprofPrimitiveArrayStripper.kt b/shark/shark-hprof/src/main/java/shark/HprofPrimitiveArrayStripper.kt
index 1e0b69188d..500cb989fc 100644
--- a/shark/shark-hprof/src/main/java/shark/HprofPrimitiveArrayStripper.kt
+++ b/shark/shark-hprof/src/main/java/shark/HprofPrimitiveArrayStripper.kt
@@ -1,7 +1,8 @@
 package shark
 
 import okio.BufferedSink
-import okio.Okio
+import okio.buffer
+import okio.sink
 import shark.HprofRecord.HeapDumpEndRecord
 import shark.HprofRecord.HeapDumpRecord.ObjectRecord.PrimitiveArrayDumpRecord.BooleanArrayDump
 import shark.HprofRecord.HeapDumpRecord.ObjectRecord.PrimitiveArrayDumpRecord.ByteArrayDump
@@ -38,7 +39,7 @@ class HprofPrimitiveArrayStripper {
   ): File {
     stripPrimitiveArrays(
       hprofSourceProvider = FileSourceProvider(inputHprofFile),
-      hprofSink = Okio.buffer(Okio.sink(outputHprofFile.outputStream()))
+      hprofSink = outputHprofFile.outputStream().sink().buffer()
     )
     return outputHprofFile
   }
diff --git a/shark/shark-hprof/src/main/java/shark/HprofWriter.kt b/shark/shark-hprof/src/main/java/shark/HprofWriter.kt
index ae3c1a8142..c24633198e 100644
--- a/shark/shark-hprof/src/main/java/shark/HprofWriter.kt
+++ b/shark/shark-hprof/src/main/java/shark/HprofWriter.kt
@@ -4,7 +4,8 @@ import java.io.Closeable
 import java.io.File
 import okio.Buffer
 import okio.BufferedSink
-import okio.Okio
+import okio.buffer
+import okio.sink
 import shark.GcRoot.Debugger
 import shark.GcRoot.Finalizing
 import shark.GcRoot.InternedString
@@ -422,13 +423,13 @@ class HprofWriter private constructor(
   ) {
     flushHeapBuffer()
     workBuffer.block()
-    writeTagHeader(tag, workBuffer.size())
+    writeTagHeader(tag, workBuffer.size)
     writeAll(workBuffer)
   }
 
   private fun BufferedSink.flushHeapBuffer() {
-    if (workBuffer.size() > 0) {
-      writeTagHeader(HprofRecordTag.HEAP_DUMP.tag, workBuffer.size())
+    if (workBuffer.size > 0) {
+      writeTagHeader(HprofRecordTag.HEAP_DUMP.tag, workBuffer.size)
       writeAll(workBuffer)
       writeTagHeader(HprofRecordTag.HEAP_DUMP_END.tag, 0)
     }
@@ -460,7 +461,7 @@ class HprofWriter private constructor(
       hprofFile: File,
       hprofHeader: HprofHeader = HprofHeader()
     ): HprofWriter {
-      return openWriterFor(Okio.buffer(Okio.sink(hprofFile.outputStream())), hprofHeader)
+      return openWriterFor(hprofFile.outputStream().sink().buffer(), hprofHeader)
     }
 
     fun openWriterFor(
diff --git a/shark/shark-hprof/src/main/java/shark/RandomAccessHprofReader.kt b/shark/shark-hprof/src/main/java/shark/RandomAccessHprofReader.kt
index 46402e7d37..4f1889c748 100644
--- a/shark/shark-hprof/src/main/java/shark/RandomAccessHprofReader.kt
+++ b/shark/shark-hprof/src/main/java/shark/RandomAccessHprofReader.kt
@@ -41,8 +41,8 @@ class RandomAccessHprofReader private constructor(
       mutableByteCount -= bytesRead
     }
     return withRecordReader(reader).apply {
-      check(buffer.size() == 0L) {
-        "Buffer not fully consumed: ${buffer.size()} bytes left"
+      check(buffer.size == 0L) {
+        "Buffer not fully consumed: ${buffer.size} bytes left"
       }
     }
   }
@@ -69,4 +69,4 @@ class RandomAccessHprofReader private constructor(
       return RandomAccessHprofReader(hprofSourceProvider.openRandomAccessSource(), hprofHeader)
     }
   }
-}
\ No newline at end of file
+}
diff --git a/shark/shark-hprof/src/main/java/shark/RandomAccessSource.kt b/shark/shark-hprof/src/main/java/shark/RandomAccessSource.kt
index c25001bc90..f5eae0f85f 100644
--- a/shark/shark-hprof/src/main/java/shark/RandomAccessSource.kt
+++ b/shark/shark-hprof/src/main/java/shark/RandomAccessSource.kt
@@ -2,9 +2,9 @@ package shark
 
 import okio.Buffer
 import okio.BufferedSource
-import okio.Okio
 import okio.Source
 import okio.Timeout
+import okio.buffer
 import java.io.Closeable
 import java.io.IOException
 
@@ -17,7 +17,7 @@ interface RandomAccessSource : Closeable {
   ): Long
 
   fun asStreamingSource(): BufferedSource {
-    return Okio.buffer(object : Source {
+    return (object : Source {
       var position = 0L
 
       override fun timeout() = Timeout.NONE
@@ -40,6 +40,6 @@ interface RandomAccessSource : Closeable {
         position += bytesRead
         return bytesRead
       }
-    })
+    }).buffer()
   }
 }
diff --git a/shark/shark-hprof/src/main/java/shark/ThrowingCancelableFileSourceProvider.kt b/shark/shark-hprof/src/main/java/shark/ThrowingCancelableFileSourceProvider.kt
index 3f40c68aba..a350ee10ea 100644
--- a/shark/shark-hprof/src/main/java/shark/ThrowingCancelableFileSourceProvider.kt
+++ b/shark/shark-hprof/src/main/java/shark/ThrowingCancelableFileSourceProvider.kt
@@ -6,6 +6,8 @@ import okio.Buffer
 import okio.BufferedSource
 import okio.Okio
 import okio.Source
+import okio.buffer
+import okio.source
 
 /**
  * A [DualSourceProvider] that invokes [throwIfCanceled] before every read, allowing
@@ -17,8 +19,8 @@ class ThrowingCancelableFileSourceProvider(
 ) : DualSourceProvider {
 
   override fun openStreamingSource(): BufferedSource {
-    val realSource = Okio.source(file.inputStream())
-    return Okio.buffer(object : Source by realSource {
+    val realSource = file.inputStream().source()
+    return (object : Source by realSource {
       override fun read(
         sink: Buffer,
         byteCount: Long
@@ -26,7 +28,7 @@ class ThrowingCancelableFileSourceProvider(
         throwIfCanceled.run()
         return realSource.read(sink, byteCount)
       }
-    })
+    }).buffer()
   }
 
   override fun openRandomAccessSource(): RandomAccessSource {
diff --git a/shark/shark/src/main/java/shark/LeakTraceObject.kt b/shark/shark/src/main/java/shark/LeakTraceObject.kt
index e9c2b7a5a9..5c24ca718c 100644
--- a/shark/shark/src/main/java/shark/LeakTraceObject.kt
+++ b/shark/shark/src/main/java/shark/LeakTraceObject.kt
@@ -47,7 +47,7 @@ data class LeakTraceObject(
   val classSimpleName: String get() = className.lastSegment('.')
 
   val typeName
-    get() = type.name.toLowerCase(Locale.US)
+    get() = type.name.lowercase(Locale.US)
 
   override fun toString(): String {
     val firstLinePrefix = ""
@@ -113,4 +113,4 @@ data class LeakTraceObject(
       return String.format("%.1f %sB", bytes / unit.toDouble().pow(exp.toDouble()), pre)
     }
   }
-}
\ No newline at end of file
+}