diff --git a/core/runtime.rs.1 b/core/runtime.rs
index 71aad8e..a806ecd 100644
@@ -140,16 +140,15 @@ impl Drop for JsRuntime {
   }
 }
 
-fn v8_init(v8_platform: Option<v8::UniquePtr<v8::Platform>>) {
+fn v8_init(v8_platform: Option<v8::SharedRef<v8::Platform>>) {
   // Include 10MB ICU data file.
   #[repr(C, align(16))]
-  struct IcuData([u8; 10413584]);
+  struct IcuData([u8; 10144432]);
   static ICU_DATA: IcuData = IcuData(*include_bytes!("icudtl.dat"));
-  v8::icu::set_common_data(&ICU_DATA.0).unwrap();
+  v8::icu::set_common_data_69(&ICU_DATA.0).unwrap();
 
   let v8_platform = v8_platform
-    .unwrap_or_else(v8::new_default_platform)
-    .unwrap();
+    .unwrap_or_else(|| v8::new_default_platform(0, false).make_shared());
   v8::V8::initialize_platform(v8_platform);
   v8::V8::initialize();
 
@@ -159,9 +158,10 @@ fn v8_init(v8_platform: Option<v8::UniquePtr<v8::Platform>>) {
     // PumpMessageLoop and RunMicrotasks setup correctly.
     // See https://github.com/denoland/deno/issues/2544
     " --experimental-wasm-threads",
-    " --no-wasm-async-compilation",
+    " --wasm-test-streaming",
     " --harmony-import-assertions",
     " --no-validate-asm",
+    " --sparkplug",
   );
   v8::V8::set_flags_from_string(flags);
 }
@@ -203,7 +203,7 @@ pub struct RuntimeOptions {
 
   /// V8 platform instance to use. Used when Deno initializes V8
   /// (which it only does once), otherwise it's silenty dropped.
-  pub v8_platform: Option<v8::UniquePtr<v8::Platform>>,
+  pub v8_platform: Option<v8::SharedRef<v8::Platform>>,
 
   /// Create a V8 inspector and attach to the runtime.
   pub attach_inspector: bool,
@@ -1966,7 +1966,7 @@ main();
   #[test]
   fn test_v8_platform() {
     let options = RuntimeOptions {
-      v8_platform: Some(v8::new_default_platform()),
+      v8_platform: Some(v8::new_default_platform(0, false).make_shared()),
       ..Default::default()
     };
     let mut runtime = JsRuntime::new(options);