diff --git a/Cargo.lock b/Cargo.lock
index 5c51647..3a47a6d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1161,7 +1161,6 @@ dependencies = [
  "harmony",
  "harmony_cli",
  "harmony_macros",
- "serde_yaml",
  "tokio",
  "url",
 ]
diff --git a/examples/monitoring/Cargo.toml b/examples/monitoring/Cargo.toml
index 1f27939..1c35330 100644
--- a/examples/monitoring/Cargo.toml
+++ b/examples/monitoring/Cargo.toml
@@ -9,6 +9,5 @@ license.workspace = true
 harmony = { version = "0.1.0", path = "../../harmony" }
 harmony_cli = { version = "0.1.0", path = "../../harmony_cli" }
 harmony_macros = { version = "0.1.0", path = "../../harmony_macros" }
-serde_yaml.workspace = true
 tokio.workspace = true
 url.workspace = true
diff --git a/examples/monitoring/src/main.rs b/examples/monitoring/src/main.rs
index bb48ccf..59e9f6b 100644
--- a/examples/monitoring/src/main.rs
+++ b/examples/monitoring/src/main.rs
@@ -1,3 +1,5 @@
+use std::collections::HashMap;
+
 use harmony::{
     inventory::Inventory,
     maestro::Maestro,
@@ -56,15 +58,14 @@ async fn main() {
         relabelings: vec![],
     };
 
-    let mut selector = Mapping::new();
+    let mut selector = HashMap::new();
     selector.insert(
-        Value::from("matchExpressions"),
-        serde_yaml::to_value(vec![Selector {
+        "matchExpressions".to_string(),
+        vec![Selector {
             key: "monitored".to_string(),
             operator: "In".to_string(),
             values: vec!["test-service-1".to_string()],
-        }])
-        .expect("couldn't create mapping value"),
+        }],
     );
 
     let service_monitor = ServiceMonitor {
diff --git a/harmony/src/modules/monitoring/kube_prometheus/types.rs b/harmony/src/modules/monitoring/kube_prometheus/types.rs
index 60c8168..59d6ebc 100644
--- a/harmony/src/modules/monitoring/kube_prometheus/types.rs
+++ b/harmony/src/modules/monitoring/kube_prometheus/types.rs
@@ -178,7 +178,7 @@ pub struct ServiceMonitor {
     //       values:
     //         - example-service-1
     //         - example-service-2
-    pub selector: Mapping,
+    pub selector: HashMap<String, Vec<Selector>>,
 
     //   # label selector for services
     pub match_labels: Option<Mapping>,