diff --git a/Cargo.lock b/Cargo.lock
index 798e059ef..da74d5942 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2377,19 +2377,20 @@ dependencies = [
 
 [[package]]
 name = "metrics"
-version = "0.14.2"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58e285601dcfb9f3a8f37a7093b9956a0df730b50848c8ac0117406aff06c851"
+checksum = "c53c23fff9a59f261498953cf41dc9ffc2522fd79723bdf283c1e88dc1633624"
 dependencies = [
  "metrics-macros",
  "proc-macro-hack",
+ "t1ha",
 ]
 
 [[package]]
 name = "metrics-macros"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11ac60cd4d3a869fd39d57baf0ed7f79fb677580d8d6655c4330d4f1126bc27b"
+checksum = "b22572ba9964744e261d34553568683b76db277bcd309ebf7215e28e0982505d"
 dependencies = [
  "lazy_static",
  "proc-macro-hack",
@@ -4107,6 +4108,18 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "t1ha"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa44aa51ae1a544e2c35a38831ba54ae40591f21384816f531b84f3e984b9ccc"
+dependencies = [
+ "cfg-if 0.1.10",
+ "lazy_static",
+ "num-traits 0.2.14",
+ "rustc_version",
+]
+
 [[package]]
 name = "tabout"
 version = "0.3.0"
diff --git a/codec/Cargo.toml b/codec/Cargo.toml
index feabe8e8c..69a9d82bc 100644
--- a/codec/Cargo.toml
+++ b/codec/Cargo.toml
@@ -11,7 +11,7 @@ anyhow = "1.0"
 config = { path = "../config" }
 leb128 = "0.2"
 log = "0.4"
-metrics = { version="0.14", features=["std"]}
+metrics = { version="0.15", features=["std"]}
 mux = { path = "../mux" }
 portable-pty = { path = "../pty", features = ["serde_support"]}
 rangeset = { path = "../rangeset" }
diff --git a/wezterm-client/Cargo.toml b/wezterm-client/Cargo.toml
index a2f284f10..0388fed6b 100644
--- a/wezterm-client/Cargo.toml
+++ b/wezterm-client/Cargo.toml
@@ -16,7 +16,7 @@ filedescriptor = { version="0.7", path = "../filedescriptor" }
 futures = "0.3"
 log = "0.4"
 lru = "0.6"
-metrics = { version="0.14", features=["std"]}
+metrics = { version="0.15", features=["std"]}
 mux = { path = "../mux" }
 openssl = "0.10"
 portable-pty = { path = "../pty", features = ["serde_support"]}
diff --git a/wezterm-font/Cargo.toml b/wezterm-font/Cargo.toml
index a166b746f..24d48619c 100644
--- a/wezterm-font/Cargo.toml
+++ b/wezterm-font/Cargo.toml
@@ -17,7 +17,7 @@ harfbuzz = { path = "../deps/harfbuzz" }
 lazy_static = "1.4"
 log = "0.4"
 memmap2 = "0.2"
-metrics = { version="0.14", features=["std"]}
+metrics = { version="0.15", features=["std"]}
 mux = { path = "../mux" }
 ordered-float = "2.1"
 rangeset = { path = "../rangeset" }
diff --git a/wezterm-gui/Cargo.toml b/wezterm-gui/Cargo.toml
index 2ba32ba89..211d918cb 100644
--- a/wezterm-gui/Cargo.toml
+++ b/wezterm-gui/Cargo.toml
@@ -34,7 +34,7 @@ libc = "0.2"
 log = "0.4"
 lru = "0.6"
 luahelper = { path = "../luahelper" }
-metrics = { version="0.14", features=["std"]}
+metrics = { version="0.15", features=["std"]}
 mlua = "0.5"
 mux = { path = "../mux" }
 open = "1.4"
diff --git a/wezterm-gui/src/stats.rs b/wezterm-gui/src/stats.rs
index ddad84584..07010f5e7 100644
--- a/wezterm-gui/src/stats.rs
+++ b/wezterm-gui/src/stats.rs
@@ -109,32 +109,37 @@ impl Stats {
 }
 
 impl Recorder for Stats {
-    fn register_counter(&self, _key: Key, _unit: Option<Unit>, _description: Option<&'static str>) {
-    }
-
-    fn register_gauge(&self, _key: Key, _unit: Option<Unit>, _description: Option<&'static str>) {}
-
-    fn register_histogram(
+    fn register_counter(
         &self,
-        _key: Key,
+        _key: &Key,
         _unit: Option<Unit>,
         _description: Option<&'static str>,
     ) {
     }
 
-    fn increment_counter(&self, key: Key, value: u64) {
+    fn register_gauge(&self, _key: &Key, _unit: Option<Unit>, _description: Option<&'static str>) {}
+
+    fn register_histogram(
+        &self,
+        _key: &Key,
+        _unit: Option<Unit>,
+        _description: Option<&'static str>,
+    ) {
+    }
+
+    fn increment_counter(&self, key: &Key, value: u64) {
         log::trace!("counter '{}' -> {}", key, value);
     }
 
-    fn update_gauge(&self, key: Key, value: GaugeValue) {
+    fn update_gauge(&self, key: &Key, value: GaugeValue) {
         log::trace!("gauge '{}' -> {:?}", key, value);
     }
 
-    fn record_histogram(&self, key: Key, value: f64) {
+    fn record_histogram(&self, key: &Key, value: f64) {
         let mut inner = self.inner.lock().unwrap();
         let histogram = inner
             .histograms
-            .entry(key)
+            .entry(key.clone())
             .or_insert_with(|| Histogram::new(2).expect("failed to crate new Histogram"));
         histogram.record(value as u64).ok();
     }
diff --git a/window/Cargo.toml b/window/Cargo.toml
index c05ac0056..372f3aff9 100644
--- a/window/Cargo.toml
+++ b/window/Cargo.toml
@@ -29,7 +29,7 @@ lazy_static = "1.4"
 libloading = "0.6"
 line_drawing = "0.8"
 log = "0.4"
-metrics = { version="0.14", features=["std"]}
+metrics = { version="0.15", features=["std"]}
 promise = { path = "../promise" }
 raw-window-handle = "0.3"
 resize = "0.5"