diff --git a/gradle.properties b/gradle.properties
index f5f93a61..32c0bc64 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -94,8 +94,8 @@ KOTLINX_COROUTINES_VERSION=1.5.2
 KOTLIN_VERSION=1.5.31
 MOCKITO_KOTLIN_VERSION=2.2.0
 MOCKITO_VERSION=3.11.1
-OKHTTP_VERSION=3.8.0
-OKIO_VERSION=1.17.5
+OKHTTP_VERSION=4.9.2
+OKIO_VERSION=3.0.0
 PROTOC_VERSION=3.19.1
 ZCASH_WALLET_PLUGINS_VERSION=1.0.1
 
diff --git a/sdk-lib/src/main/java/cash/z/ecc/android/sdk/internal/SaplingParamTool.kt b/sdk-lib/src/main/java/cash/z/ecc/android/sdk/internal/SaplingParamTool.kt
index 6383165a..f53dbde7 100644
--- a/sdk-lib/src/main/java/cash/z/ecc/android/sdk/internal/SaplingParamTool.kt
+++ b/sdk-lib/src/main/java/cash/z/ecc/android/sdk/internal/SaplingParamTool.kt
@@ -6,7 +6,8 @@ import com.squareup.okhttp.OkHttpClient
 import com.squareup.okhttp.Request
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import okio.Okio
+import okio.buffer
+import okio.sink
 import java.io.File
 
 class SaplingParamTool {
@@ -68,7 +69,7 @@ class SaplingParamTool {
                         twig("directory did not exist attempting to make it")
                         file.parentFile.mkdirs()
                     }
-                    Okio.buffer(Okio.sink(file)).use {
+                    file.sink().buffer().use {
                         twig("writing to $file")
                         it.writeAll(response.body().source())
                     }