diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4da8856d..1bfd749e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Install rust
         uses: hecrj/setup-rust-action@v1
         with:
-          rust-version: 1.43.1
+          rust-version: 1.44.0
       - name: Install clippy and rustfmt
         run: |
           rustup component add clippy
@@ -33,7 +33,7 @@ jobs:
       - name: Install Deno
         uses: denolib/setup-deno@master
         with:
-          deno-version: 1.0.5
+          deno-version: 1.2.0
       - name: Log versions
         run: |
           deno --version
diff --git a/Cargo.lock b/Cargo.lock
index c03424c9..905bc5aa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -198,9 +198,9 @@ dependencies = [
 
 [[package]]
 name = "deno_core"
-version = "0.48.3"
+version = "0.49.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4963ddfdb287602928b8847242884840381bb896fba2dda83f7408952451a3eb"
+checksum = "7dd484caae7e2e2109c37c01adeaee4d821c7460a594540508b1894b171758c0"
 dependencies = [
  "downcast-rs",
  "futures 0.3.5",
@@ -209,6 +209,7 @@ dependencies = [
  "log",
  "rusty_v8",
  "serde_json",
+ "smallvec",
  "url",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 09986eac..1226f7cb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,5 +13,5 @@ bson = "0.14.1"
 serde_json = "1.0.52"
 serde = "1.0.106"
 futures = "0.3.5"
-deno_core = "0.48.3"
+deno_core = "0.49.0"
 lazy_static = "1.4.0"
diff --git a/deps.ts b/deps.ts
index fa24e977..b05fb1b3 100644
--- a/deps.ts
+++ b/deps.ts
@@ -1 +1 @@
-export { prepare } from "https://deno.land/x/plugin_prepare@v0.6.0/mod.ts";
+export { prepare } from "https://deno.land/x/plugin_prepare@v0.7.0/mod.ts";
diff --git a/src/lib.rs b/src/lib.rs
index c6bbc175..5bf8f947 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -105,10 +105,11 @@ pub(crate) fn get_client(client_id: usize) -> Client {
     map.get(&client_id).unwrap().clone()
 }
 
-fn op_command(_interface: &mut dyn Interface, data: &[u8], zero_copy: &mut [ZeroCopyBuf]) -> Op {
-    let args = CommandArgs::new(data);
+fn op_command(_interface: &mut dyn Interface, zero_copy: &mut [ZeroCopyBuf]) -> Op {
+    let (first, rest) = zero_copy.split_first().unwrap();
+    let args = CommandArgs::new(first);
     let args2 = args.clone();
-    let command = Command::new(args, zero_copy.to_vec());
+    let command = Command::new(args, rest.to_vec());
     match args2.command_type {
         CommandType::ConnectWithOptions => util::sync_op(command::connect_with_options, command),
         CommandType::ConnectWithUri => util::sync_op(command::connect_with_uri, command),
diff --git a/test.deps.ts b/test.deps.ts
index 72533d84..f386835c 100644
--- a/test.deps.ts
+++ b/test.deps.ts
@@ -1,7 +1,7 @@
-export { exists } from "https://deno.land/std@v0.53.0/fs/mod.ts";
+export { exists } from "https://deno.land/std@0.61.0/fs/mod.ts";
 export {
   assert,
   assertEquals,
   assertThrows,
   assertThrowsAsync,
-} from "https://deno.land/std@v0.53.0/testing/asserts.ts";
+} from "https://deno.land/std@0.61.0/testing/asserts.ts";