diff --git a/lib/workers/branch/npm.js b/lib/workers/branch/npm.js
index 9de0b9b52e26c09a8d8975011382b4bf752b89b1..0a6b23d92439fcf77c86747ff80c40acca3699f3 100644
--- a/lib/workers/branch/npm.js
+++ b/lib/workers/branch/npm.js
@@ -1,3 +1,4 @@
+const eol = require('eol');
 const fs = require('fs-extra');
 const cp = require('child_process');
 const path = require('path');
@@ -118,7 +119,9 @@ async function maintainLockFile(inputConfig) {
     logger
   );
   logger.trace(`newPackageLock:\n${newPackageLock.contents}`);
-  if (existingPackageLock.toString() === newPackageLock.contents.toString()) {
+  if (
+    eol.lf(existingPackageLock) === eol.lf(newPackageLock.contents.toString())
+  ) {
     logger.debug('npm lock file does not need updating');
     return null;
   }
diff --git a/lib/workers/branch/yarn.js b/lib/workers/branch/yarn.js
index 02405837c142e21a1cfe0555606d6a68c5d9f759..a1f998ebd91206ee549cb865a9a3ec07f6d5d4ec 100644
--- a/lib/workers/branch/yarn.js
+++ b/lib/workers/branch/yarn.js
@@ -1,3 +1,4 @@
+const eol = require('eol');
 const fs = require('fs-extra');
 const cp = require('child_process');
 const path = require('path');
@@ -121,7 +122,7 @@ async function maintainLockFile(inputConfig) {
     logger
   );
   logger.trace(`newYarnLock:\n${newYarnLock.contents}`);
-  if (existingYarnLock.toString() === newYarnLock.contents.toString()) {
+  if (eol.lf(existingYarnLock) === eol.lf(newYarnLock.contents.toString())) {
     logger.debug('Yarn lock file does not need updating');
     return null;
   }
diff --git a/package.json b/package.json
index 344abdf5ad037cfa09bd0e050e4f481f50350a67..526cc09710956e0af9281e7f3dc1a44050506869 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "changelog": "1.4.0",
     "commander": "2.11.0",
     "conventional-commits-detector": "0.1.1",
+    "eol": "0.9.0",
     "fs-extra": "4.0.1",
     "gh-got": "6.0.0",
     "github-url-from-git": "1.5.0",
diff --git a/yarn.lock b/yarn.lock
index 6b7336f657a3e5b3c2ee3433275c830164170213..c7381ddccea0ac03e77c95646ed4da8532050fa8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1147,6 +1147,10 @@ ecdsa-sig-formatter@1.0.9:
     base64url "^2.0.0"
     safe-buffer "^5.0.1"
 
+eol@0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/eol/-/eol-0.9.0.tgz#5c33e25b7001bbb69ca6947593d3332e36e04f6a"
+
 errno@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.4.tgz#b896e23a9e5e8ba33871fc996abd3635fc9a1c7d"