diff --git a/Cargo.lock b/Cargo.lock
index a31ddb6f..94e2eda7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -393,6 +393,21 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
 
+[[package]]
+name = "bit-set"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -639,6 +654,12 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
 
+[[package]]
+name = "cooked-waker"
+version = "5.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147be55d677052dabc6b22252d5dd0fd4c29c8c27aa4f2fbef0f94aa003b406f"
+
 [[package]]
 name = "core-foundation"
 version = "0.9.4"
@@ -838,26 +859,31 @@ dependencies = [
 
 [[package]]
 name = "deno_console"
-version = "0.127.0"
+version = "0.136.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "deed4ab844857520058dab8f8f07d6c0be0e5a525e424a13c047f3756b18ca45"
+checksum = "598ab6c4aeb4bd4e3e31d90b8f6dd772f25ed92fc979ff12c641074ef4553030"
 dependencies = [
  "deno_core",
 ]
 
 [[package]]
 name = "deno_core"
-version = "0.232.0"
+version = "0.256.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "229ffd108e028b148a1a5a6122f771bc7c37094170226f44b8b93b3a9b79d114"
+checksum = "cd5997286bcc46199bbae727f43ee65cf4bd073ac2d240a36a6ceae3bfab14ac"
 dependencies = [
  "anyhow",
+ "bit-set",
+ "bit-vec",
  "bytes",
+ "cooked-waker",
+ "deno_core_icudata",
  "deno_ops",
  "deno_unsync",
  "futures",
  "libc",
  "log",
+ "memoffset",
  "parking_lot 0.12.1",
  "pin-project",
  "serde",
@@ -865,16 +891,23 @@ dependencies = [
  "serde_v8",
  "smallvec",
  "sourcemap",
+ "static_assertions",
  "tokio",
  "url",
  "v8",
 ]
 
+[[package]]
+name = "deno_core_icudata"
+version = "0.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a13951ea98c0a4c372f162d669193b4c9d991512de9f2381dd161027f34b26b1"
+
 [[package]]
 name = "deno_crypto"
-version = "0.141.0"
+version = "0.150.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c491190b39ba91cff55ca2c285a11a885ac3bb2ed11a4dbc54cdc02fa31411b9"
+checksum = "fe3cc83b7fe945183ef27be203c54276abef9fbda4844722f10e0af341a316fd"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -891,6 +924,7 @@ dependencies = [
  "once_cell",
  "p256",
  "p384",
+ "p521",
  "rand",
  "ring 0.17.7",
  "rsa",
@@ -907,9 +941,9 @@ dependencies = [
 
 [[package]]
 name = "deno_fetch"
-version = "0.151.0"
+version = "0.160.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf39d15b9e0f8f1b66a856f57a91ae3dec7e501bc5800cd9122f3cb16e85c9f5"
+checksum = "5860515fb73057028018761e937edc4c910207d40d9d9721bb0bb1dfc355fb54"
 dependencies = [
  "bytes",
  "data-url",
@@ -917,8 +951,10 @@ dependencies = [
  "deno_tls",
  "dyn-clone",
  "http",
+ "pin-project",
  "reqwest",
  "serde",
+ "serde_json",
  "tokio",
  "tokio-util",
 ]
@@ -938,9 +974,9 @@ dependencies = [
 
 [[package]]
 name = "deno_ops"
-version = "0.108.0"
+version = "0.132.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7dde627916f8539f3f0d2e754dda40810c8ca4d655f2eaac1ef54785a12fd27"
+checksum = "02163d08afdd6fcf21e37c399c7425987c7170203a853052a800e80c91c2e87b"
 dependencies = [
  "proc-macro-rules",
  "proc-macro2",
@@ -953,9 +989,9 @@ dependencies = [
 
 [[package]]
 name = "deno_tls"
-version = "0.114.0"
+version = "0.123.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97205b229f51eb037c2ca9a827d78b2cdfa9d28065e35c6d3014353ada6e4594"
+checksum = "334380ef454db2148df9aba7541bc8250bb4e6fb183ece9fdb293be0462eb7ad"
 dependencies = [
  "deno_core",
  "deno_native_certs",
@@ -969,18 +1005,18 @@ dependencies = [
 
 [[package]]
 name = "deno_unsync"
-version = "0.3.0"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8a8f3722afd50e566ecfc783cc8a3a046bc4dd5eb45007431dfb2776aeb8993"
+checksum = "30dff7e03584dbae188dae96a0f1876740054809b2ad0cf7c9fc5d361f20e739"
 dependencies = [
  "tokio",
 ]
 
 [[package]]
 name = "deno_url"
-version = "0.127.0"
+version = "0.136.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1539aae8dc4e9566b4534da29aa7606c634f32a75585e1fdd6bb0010f527e639"
+checksum = "7978221ce33221ac7a18b649a5a18fe7983fbe2fddf5a6959fc672089c10f9a9"
 dependencies = [
  "deno_core",
  "serde",
@@ -989,9 +1025,9 @@ dependencies = [
 
 [[package]]
 name = "deno_web"
-version = "0.158.0"
+version = "0.167.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b926030905590d563f6b194458cc0956aa9ca4774bdbb201c11956772c5c665"
+checksum = "67d78f50e55155b77abbf8fa6bdc24f68442c91742e03b67b66cc258f4b31cd1"
 dependencies = [
  "async-trait",
  "base64-simd",
@@ -1008,9 +1044,9 @@ dependencies = [
 
 [[package]]
 name = "deno_webidl"
-version = "0.127.0"
+version = "0.136.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ff2678fcf30a2bd019e25ed611d7d895172b1208424c2423d4f681e30ce44e8"
+checksum = "41eff4e69896e0f7fc432271c369052efd1d0b57a3d352688e2df800d1aa8dd9"
 dependencies = [
  "deno_core",
 ]
@@ -1333,9 +1369,9 @@ dependencies = [
 
 [[package]]
 name = "fslock"
-version = "0.1.8"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57eafdd0c16f57161105ae1b98a1238f97645f2f588438b2949c99a2af9616bf"
+checksum = "04412b8935272e3a9bae6f48c7bfff74c2911f60525404edfdd28e49884c3bfb"
 dependencies = [
  "libc",
  "winapi",
@@ -2744,6 +2780,20 @@ dependencies = [
  "sha2",
 ]
 
+[[package]]
+name = "p521"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fc9e2161f1f215afdfce23677034ae137bbd45016a880c2eb3ba8eb95f085b2"
+dependencies = [
+ "base16ct",
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "rand_core 0.6.4",
+ "sha2",
+]
+
 [[package]]
 name = "parking"
 version = "2.2.0"
@@ -3227,9 +3277,9 @@ checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "reqwest"
-version = "0.11.22"
+version = "0.11.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
+checksum = "3e9ad3fe7488d7e34558a2033d45a0c90b72d97b4f80705666fea71472e2e6a1"
 dependencies = [
  "async-compression",
  "base64 0.21.5",
@@ -3254,7 +3304,6 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_urlencoded",
- "system-configuration",
  "tokio",
  "tokio-rustls",
  "tokio-socks",
@@ -3650,9 +3699,9 @@ dependencies = [
 
 [[package]]
 name = "serde_v8"
-version = "0.141.0"
+version = "0.165.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc689cb316d67b200e9f7449ce76cceb7e483e0f828d1a9c3d057c4367b6c26e"
+checksum = "88862d513bcbc04a7f93b0f454dffd0b01a5c0d8e1964c7532ec55f52b9a6351"
 dependencies = [
  "bytes",
  "derive_more",
@@ -4318,11 +4367,11 @@ dependencies = [
 
 [[package]]
 name = "v8"
-version = "0.81.0"
+version = "0.83.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b75f5f378b9b54aff3b10da8170d26af4cfd217f644cf671badcd13af5db4beb"
+checksum = "546dcbb978f58aea3ad9286bd1df553f4ab7bbdc2e191cd4ae6c9a98fa95d1cd"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags 2.4.1",
  "fslock",
  "once_cell",
  "which",
@@ -4529,14 +4578,15 @@ checksum = "1778a42e8b3b90bff8d0f5032bf22250792889a5cdc752aa0020c84abe3aaf10"
 
 [[package]]
 name = "which"
-version = "4.4.2"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
+checksum = "9bf3ea8596f3a0dd5980b46430f2058dfe2c36a27ccfbb1845d6fbfcd9ba6e14"
 dependencies = [
  "either",
  "home",
  "once_cell",
  "rustix",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index e035785f..d0a0a79c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ repository = "https://github.com/filecoin-station/zinnia"
 assert_cmd = "2.0.13"
 assert_fs = "1.1.1"
 console_static_text = "=0.8.1"
-deno_core = "0.232.0"
+deno_core = "0.256.0"
 log = "0.4.20"
 pretty_assertions = "1.4.0"
 env_logger = "0.10.2"
diff --git a/cli/tests/cli_tests.rs b/cli/tests/cli_tests.rs
index 6580cc25..96e6ad83 100644
--- a/cli/tests/cli_tests.rs
+++ b/cli/tests/cli_tests.rs
@@ -72,7 +72,7 @@ function fail() {
 
     let expected_stderr = format!(
         r#"
-  error: Uncaught Error: boom!
+  error: Uncaught (in promise) Error: boom!
   throw new Error("boom!");
         ^
     at fail ({mod_url}:5:9)
diff --git a/ext/libp2p/js/01_peer.js b/ext/libp2p/js/01_peer.js
index 54e32f4b..a7fb361e 100644
--- a/ext/libp2p/js/01_peer.js
+++ b/ext/libp2p/js/01_peer.js
@@ -1,5 +1,6 @@
 const core = globalThis.Deno.core;
-const { ops, opAsync } = core;
+const { ops } = core;
+const { op_p2p_request_protocol } = core.ensureFastOps();
 
 async function requestProtocol(remoteAddress, protocolName, requestPayload) {
   if (typeof remoteAddress !== "string")
@@ -11,8 +12,7 @@ async function requestProtocol(remoteAddress, protocolName, requestPayload) {
     throw new TypeError(`requestPayload must be Uint8Array (found: ${actualType})`);
   }
 
-  const responsePayload = await opAsync(
-    "op_p2p_request_protocol",
+  const responsePayload = await op_p2p_request_protocol(
     remoteAddress,
     protocolName,
     requestPayload,
diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml
index db19854e..a1d816df 100644
--- a/runtime/Cargo.toml
+++ b/runtime/Cargo.toml
@@ -14,13 +14,13 @@ path = "lib.rs"
 [dependencies]
 console_static_text.workspace = true
 chrono = { version= "0.4.33", default-features = false, features = [ "clock", "std" ] }
-deno_console = "0.127.0"
+deno_console = "0.136.0"
 deno_core.workspace = true
-deno_crypto = "0.141.0"
-deno_fetch = "0.151.0"
-deno_url = "0.127.0"
-deno_web = "0.158.0"
-deno_webidl = "0.127.0"
+deno_crypto = "0.150.0"
+deno_fetch = "0.160.0"
+deno_url = "0.136.0"
+deno_web = "0.167.0"
+deno_webidl = "0.136.0"
 lassie = "0.9.0"
 # lassie = { git = "https://github.com/filecoin-station/rusty-lassie.git" }
 log.workspace = true
diff --git a/runtime/js/98_global_scope.js b/runtime/js/98_global_scope.js
index 1fd93c71..9f9a5b0f 100644
--- a/runtime/js/98_global_scope.js
+++ b/runtime/js/98_global_scope.js
@@ -27,7 +27,7 @@ import * as eventSource from "ext:deno_fetch/27_eventsource.js";
 import * as fetch from "ext:zinnia_runtime/fetch.js";
 import * as messagePort from "ext:deno_web/13_message_port.js";
 import * as webidl from "ext:deno_webidl/00_webidl.js";
-import DOMException from "ext:deno_web/01_dom_exception.js";
+import { DOMException } from "ext:deno_web/01_dom_exception.js";
 import * as abortSignal from "ext:deno_web/03_abort_signal.js";
 import * as globalInterfaces from "ext:deno_web/04_global_interfaces.js";
 import { zinniaNs, log } from "ext:zinnia_runtime/90_zinnia_apis.js";
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index d83467bf..2589e8f4 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -29,7 +29,6 @@ import {
   inspectArgs,
   quoteString,
   setNoColorFn,
-  wrapConsole,
 } from "ext:deno_console/01_console.js";
 import * as performance from "ext:deno_web/15_performance.js";
 import {
@@ -94,7 +93,7 @@ function bootstrapMainRuntime(runtimeOptions) {
   if (runtimeOptions.inspectFlag) {
     const consoleFromV8 = core.console;
     const consoleFromDeno = globalThis.console;
-    wrapConsole(consoleFromDeno, consoleFromV8);
+    core.wrapConsole(consoleFromDeno, consoleFromV8);
   }
 
   event.setEventTargetData(globalThis);
diff --git a/runtime/module_loader.rs b/runtime/module_loader.rs
index cd31e0ed..8ded81c4 100644
--- a/runtime/module_loader.rs
+++ b/runtime/module_loader.rs
@@ -4,8 +4,8 @@ use deno_core::anyhow::anyhow;
 use deno_core::error::type_error;
 use deno_core::futures::FutureExt;
 use deno_core::{
-    resolve_import, ModuleLoader, ModuleSource, ModuleSourceFuture, ModuleSpecifier, ModuleType,
-    ResolutionKind,
+    resolve_import, ModuleLoader, ModuleSource, ModuleSourceCode, ModuleSpecifier, ModuleType,
+    RequestedModuleType, ResolutionKind,
 };
 
 use tokio::fs::File;
@@ -65,11 +65,14 @@ impl ModuleLoader for ZinniaModuleLoader {
         module_specifier: &ModuleSpecifier,
         maybe_referrer: Option<&ModuleSpecifier>,
         _is_dyn_import: bool,
-    ) -> std::pin::Pin<Box<ModuleSourceFuture>> {
+        // TODO(bajtos): support loading JSON files as ES modules. See
+        // https://github.com/denoland/deno/commit/bc8d00c880756a46b0ce4c8bf0c89407a2de669c
+        _requested_module_type: RequestedModuleType,
+    ) -> deno_core::ModuleLoadResponse {
         let module_specifier = module_specifier.clone();
         let module_root = self.module_root.clone();
         let maybe_referrer = maybe_referrer.cloned();
-        async move {
+        deno_core::ModuleLoadResponse::Async(async move {
             let spec_str = module_specifier.as_str();
 
             let code = {
@@ -85,18 +88,23 @@ impl ModuleLoader for ZinniaModuleLoader {
                                 .map(|p| p.starts_with(root))
                                 .unwrap_or(false),
                         }
-                    },
+                    }
                 };
                 if is_module_local {
                     read_file_to_string(module_specifier.to_file_path().unwrap()).await?
-                } else if spec_str == "https://deno.land/std@0.177.0/testing/asserts.ts" || spec_str == "https://deno.land/std@0.181.0/testing/asserts.ts" {
+                } else if spec_str == "https://deno.land/std@0.177.0/testing/asserts.ts"
+                    || spec_str == "https://deno.land/std@0.181.0/testing/asserts.ts"
+                {
                     return Err(anyhow!(
                         "Zinnia bundles Deno asserts as 'zinnia:assert`. Please update your imports accordingly.\nModule URL: {spec_str}\nImported from: {}",
                         maybe_referrer.map(|u| u.to_string()).unwrap_or("(none)".into())
                     ));
                 } else {
                     let mut msg = if module_specifier.scheme() == "file" && module_root.is_some() {
-                         format!("Cannot import files outside of module root directory {}. ",  module_root.unwrap().display())
+                        format!(
+                            "Cannot import files outside of module root directory {}. ",
+                            module_root.unwrap().display()
+                        )
                     } else {
                         "Zinnia supports importing from relative paths only. ".to_string()
                     };
@@ -109,9 +117,13 @@ impl ModuleLoader for ZinniaModuleLoader {
                 }
             };
 
-            let module = ModuleSource::new(ModuleType::JavaScript, code.into(), &module_specifier);
+            let module = ModuleSource::new(
+                ModuleType::JavaScript,
+                ModuleSourceCode::String(code.into()),
+                &module_specifier
+            );
             Ok(module)
-        }.boxed_local()
+        }.boxed_local())
     }
 }
 
@@ -134,7 +146,7 @@ async fn read_file_to_string(path: impl AsRef<Path>) -> Result<String, AnyError>
 #[cfg(test)]
 mod tests {
     use super::*;
-    use deno_core::anyhow::Context;
+    use deno_core::{anyhow::Context, ModuleLoadResponse};
     use pretty_assertions::assert_eq;
 
     #[tokio::test]
@@ -143,13 +155,17 @@ mod tests {
         imported_file.push("99_main.js");
 
         let loader = ZinniaModuleLoader::build(Some(get_js_dir())).unwrap();
-        let result = loader
-            .load(
-                &ModuleSpecifier::from_file_path(&imported_file).unwrap(),
-                None,
-                false,
-            )
-            .await
+        let result = loader.load(
+            &ModuleSpecifier::from_file_path(&imported_file).unwrap(),
+            None,
+            false,
+            RequestedModuleType::None,
+        );
+        let result = match result {
+            ModuleLoadResponse::Async(result) => result.await,
+            ModuleLoadResponse::Sync(result) => result,
+        };
+        let result = result
             .with_context(|| format!("cannot import {}", imported_file.display()))
             .unwrap();
 
@@ -168,13 +184,16 @@ mod tests {
         imported_file.push("99_main.js");
 
         let loader = ZinniaModuleLoader::build(Some(project_root)).unwrap();
-        let result = loader
-            .load(
-                &ModuleSpecifier::from_file_path(&imported_file).unwrap(),
-                None,
-                false,
-            )
-            .await;
+        let result = loader.load(
+            &ModuleSpecifier::from_file_path(&imported_file).unwrap(),
+            None,
+            false,
+            RequestedModuleType::None,
+        );
+        let result = match result {
+            ModuleLoadResponse::Async(result) => result.await,
+            ModuleLoadResponse::Sync(result) => result,
+        };
 
         match result {
             Ok(_) => {
diff --git a/runtime/runtime.rs b/runtime/runtime.rs
index 0babab2d..10ed6ed5 100644
--- a/runtime/runtime.rs
+++ b/runtime/runtime.rs
@@ -128,8 +128,8 @@ pub async fn run_js_module(
     // Load and run the module
     let main_module_id = runtime.load_main_module(module_specifier, None).await?;
     let res = runtime.mod_evaluate(main_module_id);
-    runtime.run_event_loop(false).await?;
-    res.await??;
+    runtime.run_event_loop(Default::default()).await?;
+    res.await?;
 
     // TODO: it would be nicer to have this exposed as another Deno op
     // and call it from the JavaScript side as part of the regular runtime shutdown