diff --git a/interop/Cargo.toml b/interop/Cargo.toml
index 8d9db3564..a906d536a 100644
--- a/interop/Cargo.toml
+++ b/interop/Cargo.toml
@@ -17,7 +17,7 @@ path = "src/bin/server.rs"
 [dependencies]
 async-stream = "0.3"
 bytes = "1.0"
-clap = {version = "3.2.1", features = ["derive"]}
+clap = {version = "4.0.26", features = ["derive"]}
 console = "0.14"
 futures-core = "0.3"
 futures-util = "0.3"
diff --git a/interop/src/bin/client.rs b/interop/src/bin/client.rs
index 8ebfca860..f93baf110 100644
--- a/interop/src/bin/client.rs
+++ b/interop/src/bin/client.rs
@@ -9,11 +9,11 @@ struct Opts {
     #[clap(name = "use_tls", long, action = ArgAction::SetTrue)]
     use_tls: bool,
 
-    #[clap(
+    #[arg(
         long = "test_case",
         use_value_delimiter = true,
-        min_values = 1,
-        arg_enum,
+        num_args(1..),
+        value_enum,
         action = ArgAction::Append
     )]
     test_case: Vec<Testcase>,
@@ -99,7 +99,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 
-#[derive(Debug, Copy, Clone, clap::ArgEnum)]
+#[derive(Debug, Copy, Clone, clap::ValueEnum)]
 #[clap(rename_all = "snake_case")]
 enum Testcase {
     EmptyUnary,