diff --git a/src/index.ts b/src/index.ts
index 49ffb0c..5b23fca 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,6 @@
 import childProcess from 'child_process'
 import yaml from 'yaml'
-import mapPorts from './port-mapper'
+import mapPorts from './map-ports'
 
 export interface IDockerComposeOptions {
   cwd?: string
diff --git a/src/port-mapper.ts b/src/map-ports.ts
similarity index 100%
rename from src/port-mapper.ts
rename to src/map-ports.ts
diff --git a/test/port-mapper.test.ts b/test/map-ports.test.ts
similarity index 97%
rename from test/port-mapper.test.ts
rename to test/map-ports.test.ts
index 0c7e354..86b3363 100644
--- a/test/port-mapper.test.ts
+++ b/test/map-ports.test.ts
@@ -1,4 +1,4 @@
-import mapPorts from '../src/port-mapper'
+import mapPorts from '../src/map-ports'
 
 test('map ports for empty string', () => {
   expect(mapPorts('')).toEqual([])