diff --git a/peach-stats/Cargo.toml b/peach-stats/Cargo.toml
index af40d85..c8a4914 100644
--- a/peach-stats/Cargo.toml
+++ b/peach-stats/Cargo.toml
@@ -28,13 +28,13 @@ travis-ci = { repository = "peachcloud/peach-stats", branch = "master" }
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-env_logger = "0.6"
-jsonrpc-core = "11"
-jsonrpc-http-server = "11"
+env_logger = "0.9"
+jsonrpc-core = "18"
+jsonrpc-http-server = "18"
 log = "0.4"
 miniserde = "0.1.15"
 probes = "0.4.1"
 systemstat = "0.1.10"
 
 [dev-dependencies]
-jsonrpc-test = "11"
+jsonrpc-test = "18"
diff --git a/peach-stats/src/lib.rs b/peach-stats/src/lib.rs
index f4a8c7c..00ce6a1 100644
--- a/peach-stats/src/lib.rs
+++ b/peach-stats/src/lib.rs
@@ -16,44 +16,46 @@ pub fn run() -> Result<(), StatError> {
     info!("Creating JSON-RPC I/O handler.");
     let mut io = IoHandler::default();
 
-    io.add_method("cpu_stats", move |_| {
+    io.add_method("cpu_stats", move |_| async {
         info!("Fetching CPU statistics.");
         let stats = stats::cpu_stats()?;
 
         Ok(Value::String(stats))
     });
 
-    io.add_method("cpu_stats_percent", move |_| {
+    io.add_method("cpu_stats_percent", move |_| async {
         info!("Fetching CPU statistics as percentages.");
         let stats = stats::cpu_stats_percent()?;
 
         Ok(Value::String(stats))
     });
 
-    io.add_method("disk_usage", move |_| {
+    io.add_method("disk_usage", move |_| async {
         info!("Fetching disk usage statistics.");
         let disks = stats::disk_usage()?;
 
         Ok(Value::String(disks))
     });
 
-    io.add_method("load_average", move |_| {
+    io.add_method("load_average", move |_| async {
         info!("Fetching system load average statistics.");
         let avg = stats::load_average()?;
 
         Ok(Value::String(avg))
     });
 
-    io.add_method("mem_stats", move |_| {
+    io.add_method("mem_stats", move |_| async {
         info!("Fetching current memory statistics.");
         let mem = stats::mem_stats()?;
 
         Ok(Value::String(mem))
     });
 
-    io.add_method("ping", |_| Ok(Value::String("success".to_string())));
+    io.add_method("ping", |_| async {
+        Ok(Value::String("success".to_string()))
+    });
 
-    io.add_method("uptime", move |_| {
+    io.add_method("uptime", move |_| async {
         info!("Fetching system uptime.");
         let uptime = stats::uptime()?;
 
@@ -83,17 +85,17 @@ pub fn run() -> Result<(), StatError> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use jsonrpc_test as test;
+    use jsonrpc_test as test_rpc;
 
     // test to ensure correct success response
     #[test]
     fn rpc_success() {
         let rpc = {
             let mut io = IoHandler::new();
-            io.add_method("rpc_success_response", |_| {
+            io.add_method("rpc_success_response", |_| async {
                 Ok(Value::String("success".into()))
             });
-            test::Rpc::from(io)
+            test_rpc::Rpc::from(io)
         };
 
         assert_eq!(rpc.request("rpc_success_response", &()), r#""success""#);