diff --git a/README.md b/README.md
index 8fdcccd..9382583 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,7 @@ For this reason, it’s probably safer to provide only one of `matchZones` or `m
 There is also one non-filtering option that can be provided to configure other behaviour.
 
 * `cacheDir` _(string)_ — A path where the generated files will be cached. If not provided, the files will be cached in an automatically-generated location.
+* `momentTimezoneContext` _(regexp)_ — A regexp matching a context where `moment-timezone` is located. The timezone file will be replaced only if it is located in this context. Other instances of the timezone file out of this context will not be touched. This is useful in case you are using a version stored outside of `node_modules` (e.g. if module or vendor directory is `vendor\moment-timezone` the context could be matched for example with `vendor[\\/]moment-timezone$`). Defaults to `/node_modules[\\/]moment-timezone$/`.
 
 ### Version support
 
diff --git a/src/index.js b/src/index.js
index 1cdfac0..185c135 100644
--- a/src/index.js
+++ b/src/index.js
@@ -132,7 +132,7 @@ function throwInvalid(message) {
 
 function validateOptions(options) {
   const filteringOptions = ['matchZones', 'matchCountries', 'startYear', 'endYear'];
-  const otherOptions = ['cacheDir'];
+  const otherOptions = ['cacheDir', 'momentTimezoneContext'];
   const knownOptions = filteringOptions.concat(otherOptions);
   const optionNames = Object.keys(options);
   let usedFilteringOptions = [];
@@ -174,14 +174,16 @@ function validateOptions(options) {
     }
   });
 
-  // Invalid cache dir (not a valid path)
-  if ('cacheDir' in options) {
-    try {
-      path.parse(options.cacheDir);
-    } catch (error) {
-      throwInvalid(`Provided cacheDir is an invalid path: '${options.cacheDir}'`);
+  // Check options that require a valid path
+  ['cacheDir'].forEach(option => {
+    if (option in options) {
+      try {
+        path.parse(options[option]);
+      } catch (error) {
+        throwInvalid(`Provided ${option} is an invalid path: '${options[option]}'`);
+      }
     }
-  }
+  });
 }
 
 function MomentTimezoneDataPlugin(options = {}) {
@@ -192,11 +194,12 @@ function MomentTimezoneDataPlugin(options = {}) {
   const matchZones = options.matchZones || null;
   const matchCountries = options.matchCountries || null;
   const cacheDir = options.cacheDir || null;
+  const momentTimezoneContext = options.momentTimezoneContext || /node_modules[\\/]moment-timezone$/;
 
   return new webpack.NormalModuleReplacementPlugin(
     /data[\\/]packed[\\/]latest\.json$/,
     resource => {
-      if (resource.context.match(/node_modules[\\/]moment-timezone$/)) {
+      if (resource.context.match(momentTimezoneContext)) {
         const config = { matchZones, matchCountries, startYear, endYear };
         const tzdata = require('moment-timezone/data/packed/latest.json');
         const file = cacheFile(tzdata, config, cacheDir);
diff --git a/test/index.test.js b/test/index.test.js
index 3682ee7..2bc6072 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -31,7 +31,7 @@ describe('instantiation', () => {
     );
   });
 
-  // TOOD: Warn instead of throw?
+  // TODO: Warn instead of throw?
   it('throws when called with no arguments', () => {
     assert.throws(
       () => new MomentTimezoneDataPlugin(),
@@ -400,4 +400,33 @@ describe('usage', () => {
       assert(cachedFiles().length === 2);
     });
   });
+
+  describe('custom context', () => {
+
+    it('matches moment-timezone in the specified context', async ()  => {
+      const { data } = await buildWebpack({
+        startYear: 1700,
+        momentTimezoneContext: /node_modules[\\/]moment-timezone$/,
+      });
+      const zoneCount = data.zones.length + data.links.length;
+      assert(zoneCount === moment.tz.names().length);
+      if (momentHasCountries) {
+        assert(data.countries.length === moment.tz.countries().length);
+      }
+    });
+
+    it('does not match moment-timezone when out of the specified context', async ()  => {
+      const { data } = await buildWebpack({
+        startYear: 1700,
+        momentTimezoneContext: /nonexistingdir[\\/]moment-timezone$/,
+      });
+      assert(data == null);
+    });
+
+    /* TODO: missing
+    it('matches moment-timezone only in the specified context', async ()  => {
+    });
+     */
+
+  });
 });
diff --git a/test/utils.js b/test/utils.js
index f8eecc8..d2f4ca0 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -31,9 +31,9 @@ function buildWebpack(options) {
       }
 
       const module = Array.from(stats.compilation.modules).find(mod =>
-        rGeneratedFile.test(mod.request)
+          rGeneratedFile.test(mod.request) // Matches only if data processed (and cache generated)
       );
-      const data = module.buildInfo.jsonData;
+      const data = module ? module.buildInfo.jsonData : null; // In case no processing happened
 
       resolve({ stats, module, data });
     });