diff --git a/package.json b/package.json
index 9772c0a..a1cbdac 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "@types/chai": "^4.1.4",
     "@types/mocha": "^5.2.5",
     "@types/nock": "^9.3.0",
-    "@types/node": "^10.9.1",
+    "@types/node": "^10.9.4",
     "@types/node-notifier": "^0.0.28",
     "@types/read-pkg": "^3.0.0",
     "chai": "^4.1.2",
@@ -24,7 +24,7 @@
     "mocha": "^5.2.0",
     "ts-node": "^7.0.1",
     "tslint": "^5.11.0",
-    "typescript": "^3.0.1"
+    "typescript": "^3.0.3"
   },
   "engines": {
     "node": ">=8.0.0"
diff --git a/src/parse.ts b/src/parse.ts
index e4e0be2..e95b2d6 100644
--- a/src/parse.ts
+++ b/src/parse.ts
@@ -100,7 +100,7 @@ export class Parser<T extends ParserInput, TFlags extends OutputFlags<T['flags']
         } else {
           input = arg.slice(arg[2] === '=' ? 3 : 2)
         }
-        if (!input) {
+        if (typeof input !== 'string') {
           throw new m.errors.CLIError(`Flag --${name} expects a value`)
         }
         this.raw.push({type: 'flag', flag: flag.name, input})
diff --git a/test/parse.test.ts b/test/parse.test.ts
index ea20bb2..204238c 100644
--- a/test/parse.test.ts
+++ b/test/parse.test.ts
@@ -105,6 +105,15 @@ describe('parse', () => {
       expect(out.flags).to.deep.equal({myflag: 'foo'})
     })
 
+    it('parses value of ""', () => {
+      const out = parse(['-m', ''], {
+        flags: {
+          myflag: flags.string({char: 'm'}),
+        },
+      })
+      expect(out.flags).to.deep.equal({myflag: ''})
+    })
+
     it('requires required flag', () => {
       expect(() => {
         parse([], {
diff --git a/yarn.lock b/yarn.lock
index 2299da5..5202720 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -63,9 +63,9 @@
   version "10.7.1"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.7.1.tgz#b704d7c259aa40ee052eec678758a68d07132a2e"
 
-"@types/node@^10.9.1":
-  version "10.9.1"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.9.1.tgz#06f002136fbcf51e730995149050bb3c45ee54e6"
+"@types/node@^10.9.4":
+  version "10.9.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.9.4.tgz#0f4cb2dc7c1de6096055357f70179043c33e9897"
 
 "@types/normalize-package-data@*":
   version "2.4.0"
@@ -1156,9 +1156,9 @@ type-detect@^4.0.0:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
 
-typescript@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.1.tgz#43738f29585d3a87575520a4b93ab6026ef11fdb"
+typescript@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.3.tgz#4853b3e275ecdaa27f78fda46dc273a7eb7fc1c8"
 
 universalify@^0.1.0:
   version "0.1.2"