diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0396b0a..0a1fe9f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,10 @@
 History
 -------
 
+0.14.5
+-------------------
+- Add trace close interface
+
 0.14.4
 -------------------
 - Add trace identifiers to the `SpanContext`
diff --git a/package.json b/package.json
index cc8997a..eb37fff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "opentracing",
-  "version": "0.14.4",
+  "version": "0.14.5",
   "engines": {
     "node": ">=0.10"
   },
diff --git a/src/tracer.ts b/src/tracer.ts
index 92355c1..d473854 100644
--- a/src/tracer.ts
+++ b/src/tracer.ts
@@ -87,7 +87,7 @@ export class Tracer {
             } else {
                 options.references = [childOf];
             }
-            delete(options.childOf);
+            delete (options.childOf);
         }
         return this._startSpan(name, options);
     }
@@ -177,6 +177,12 @@ export class Tracer {
     protected _extract(format: string, carrier: any): SpanContext | null {
         return Noop.spanContext!;
     }
+
+    // close the tracer,flushes spans, and executes any callbacks if necessary
+
+    protected close(callback?: void): void {
+
+    }
 }
 
 export default Tracer;