diff --git a/packages/core/core/src/requests/PathRequest.js b/packages/core/core/src/requests/PathRequest.js
index 347fbe12468..6bb95cc21be 100644
--- a/packages/core/core/src/requests/PathRequest.js
+++ b/packages/core/core/src/requests/PathRequest.js
@@ -67,6 +67,12 @@ async function run({input, api, options}: RunOpts) {
   });
   let result: ResolverResult = await resolverRunner.resolve(input.dependency);
 
+  if (result.invalidateOnEnvChange) {
+    for (let env of result.invalidateOnEnvChange) {
+      api.invalidateOnEnvChange(env);
+    }
+  }
+
   if (result.invalidateOnFileCreate) {
     for (let file of result.invalidateOnFileCreate) {
       api.invalidateOnFileCreate(
@@ -105,6 +111,7 @@ type ResolverResult = {|
   assetGroup: ?AssetGroup,
   invalidateOnFileCreate?: Array<FileCreateInvalidation>,
   invalidateOnFileChange?: Array<FilePath>,
+  invalidateOnEnvChange?: Array<string>,
   diagnostics?: Array<Diagnostic>,
 |};
 
@@ -185,6 +192,7 @@ export class ResolverRunner {
     let diagnostics: Array<Diagnostic> = [];
     let invalidateOnFileCreate = [];
     let invalidateOnFileChange = [];
+    let invalidateOnEnvChange = [];
     for (let resolver of resolvers) {
       try {
         let result = await resolver.plugin.resolve({
@@ -208,6 +216,10 @@ export class ResolverRunner {
             dependency.priority = Priority[result.priority];
           }
 
+          if (result.invalidateOnEnvChange) {
+            invalidateOnEnvChange.push(...result.invalidateOnEnvChange);
+          }
+
           if (result.invalidateOnFileCreate) {
             invalidateOnFileCreate.push(...result.invalidateOnFileCreate);
           }
@@ -221,6 +233,7 @@ export class ResolverRunner {
               assetGroup: null,
               invalidateOnFileCreate,
               invalidateOnFileChange,
+              invalidateOnEnvChange,
             };
           }
 
@@ -251,6 +264,7 @@ export class ResolverRunner {
               },
               invalidateOnFileCreate,
               invalidateOnFileChange,
+              invalidateOnEnvChange,
             };
           }
 
@@ -286,6 +300,7 @@ export class ResolverRunner {
         assetGroup: null,
         invalidateOnFileCreate,
         invalidateOnFileChange,
+        invalidateOnEnvChange,
       };
     }
 
@@ -308,6 +323,7 @@ export class ResolverRunner {
       assetGroup: null,
       invalidateOnFileCreate,
       invalidateOnFileChange,
+      invalidateOnEnvChange,
       diagnostics,
     };
   }
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/.parcelrc b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/.parcelrc
new file mode 100644
index 00000000000..6e7fa4a9bde
--- /dev/null
+++ b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/.parcelrc
@@ -0,0 +1,4 @@
+{
+  "extends": "@parcel/config-default",
+  "resolvers": ["parcel-resolver-can-invalidateonenvchange"]
+}
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/index.js b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/index.js
new file mode 100644
index 00000000000..69b7c3258ab
--- /dev/null
+++ b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/index.js
@@ -0,0 +1 @@
+const willBeReplaced = true;
\ No newline at end of file
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/index.js b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/index.js
new file mode 100644
index 00000000000..ade8fcd2fd7
--- /dev/null
+++ b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/index.js
@@ -0,0 +1,27 @@
+// @flow
+
+const {Resolver} = require('@parcel/plugin');
+const path = require('path');
+const {default: NodeResolver} = require('@parcel/node-resolver-core');
+
+module.exports = new Resolver({
+  async resolve({dependency, options, specifier,logger}) {
+    let mainFields = ['source', 'browser', 'module', 'main'];
+    const replacedCode = options.env.replacedCode;
+    const resolver = new NodeResolver({
+      fs: options.inputFS,
+      projectRoot: options.projectRoot,
+      extensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'css', 'styl', 'vue'],
+      mainFields,
+    });
+    let result = await resolver.resolve({
+      filename: specifier,
+      specifierType: dependency.specifierType,
+      parent: dependency.sourcePath,
+      env: dependency.env,
+    });
+    result.code = replacedCode;
+    result.invalidateOnEnvChange = ['replacedCode'];
+    return result;
+  },
+});
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/package.json b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/package.json
new file mode 100644
index 00000000000..005c6096b8f
--- /dev/null
+++ b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/node_modules/parcel-resolver-can-invalidateonenvchange/package.json
@@ -0,0 +1,7 @@
+{
+    "name": "parcel-resolver-can-invalidateonenvchange",
+    "version": "1.0.0",
+    "private": true,
+    "main": "index.js"
+  }
+  
\ No newline at end of file
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/package.json b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/package.json
new file mode 100644
index 00000000000..65d2634be87
--- /dev/null
+++ b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/package.json
@@ -0,0 +1,4 @@
+{
+    "name": "test-resolver-invalidateonenevchange",
+    "private": true
+}
\ No newline at end of file
diff --git a/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/yarn.lock b/packages/core/integration-tests/test/integration/resolver-can-invalidateonenvchange/yarn.lock
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/core/integration-tests/test/plugin.js b/packages/core/integration-tests/test/plugin.js
index 26256535e64..5b86ca5fbe9 100644
--- a/packages/core/integration-tests/test/plugin.js
+++ b/packages/core/integration-tests/test/plugin.js
@@ -190,4 +190,24 @@ parcel-transformer-b`,
 
     assert.equal(await run(b), 2);
   });
+
+  it('should allow resolvers to invalidateOnEnvChange', async () => {
+    async function assertAsset(replacedCode) {
+      let b = await bundle(
+        path.join(
+          __dirname,
+          '/integration/resolver-can-invalidateonenvchange/index.js',
+        ),
+        {
+          shouldDisableCache: false,
+          inputFS: overlayFS,
+          env: {replacedCode},
+        },
+      );
+      let code = await b.getBundles()[0].getEntryAssets()[0].getCode();
+      assert(code.indexOf(replacedCode) !== -1);
+    }
+    await assertAsset('const replaced = 1;');
+    await assertAsset('const replaced = 2;');
+  });
 });
diff --git a/packages/core/types/index.js b/packages/core/types/index.js
index 57c29b0c5ee..6ca07f9001d 100644
--- a/packages/core/types/index.js
+++ b/packages/core/types/index.js
@@ -1499,6 +1499,8 @@ export type ResolveResult = {|
   +invalidateOnFileCreate?: Array<FileCreateInvalidation>,
   /** A list of files that should invalidate the resolution if modified or deleted. */
   +invalidateOnFileChange?: Array<FilePath>,
+  /** Invalidates the resolution when the given environment variable changes.*/
+  +invalidateOnEnvChange?: Array<string>,
 |};
 
 /**