diff --git a/actions/hello.yaml b/actions/hello.yaml
index 5bb7b32..637b2f8 100644
--- a/actions/hello.yaml
+++ b/actions/hello.yaml
@@ -9,6 +9,9 @@ enabled: true
 # Runner type determines how the action is executed
 runner_type: nodejs
 
+# Runtime version constraint (semver range) - selects compatible Node.js version
+runtime_version: ">=18"
+
 # Entry point is the JavaScript file to execute
 entry_point: hello.js
 
diff --git a/actions/http_example.yaml b/actions/http_example.yaml
index b6c02c2..6aaee93 100644
--- a/actions/http_example.yaml
+++ b/actions/http_example.yaml
@@ -9,6 +9,9 @@ enabled: true
 # Runner type
 runner_type: nodejs
 
+# Runtime version constraint (semver range)
+runtime_version: ">=18"
+
 # Entry point
 entry_point: http_example.js
 
diff --git a/actions/read_counter.yaml b/actions/read_counter.yaml
index 5a78f7f..f7bd772 100644
--- a/actions/read_counter.yaml
+++ b/actions/read_counter.yaml
@@ -9,6 +9,9 @@ enabled: true
 # Runner type
 runner_type: nodejs
 
+# Runtime version constraint (semver range)
+runtime_version: ">=18"
+
 # Entry point
 entry_point: read_counter.js
 
diff --git a/sensors/counter_sensor.yaml b/sensors/counter_sensor.yaml
index 2621ebe..9e0f949 100644
--- a/sensors/counter_sensor.yaml
+++ b/sensors/counter_sensor.yaml
@@ -13,6 +13,9 @@ enabled: true
 # Sensor runner type
 runner_type: nodejs
 
+# Minimum Node.js version required (semver constraint)
+runtime_version: ">=18"
+
 # Entry point for sensor execution
 entry_point: counter_sensor.js