diff --git a/src/parser.ts b/src/parser.ts
index 2bded46a..7ad53e69 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -187,7 +187,7 @@ export const Import: Parser<ImportNode> = node(ImportNode)(() =>
 
 export const name: Parser<Name> = lazy('identifier', () => regex(/[^\W\d]\w*/))
 
-export const packageName: Parser<Name> = regex(/\W[\W-]*/)
+export const packageName: Parser<Name> = lazy('package identifier', () => regex(/[^\W\d][\w-]*/))
 
 export const FullyQualifiedReference: Parser<ReferenceNode<any>> = node(ReferenceNode)(() =>
   obj({ name: packageName.or(name).sepBy1(key('.')).tieWith('.') })
diff --git a/src/validator/index.ts b/src/validator/index.ts
index ed2c3c80..ee85f7e1 100644
--- a/src/validator/index.ts
+++ b/src/validator/index.ts
@@ -453,7 +453,7 @@ sourceMapForNodeName)
 
 export const shouldNotUseSpecialCharactersInName = error<Package>(node =>
   !node.fileName ||
-    node.fileName.match(/([A-Za-z.\-_/\d])/g)!.length === node.fileName.length
+    node.fileName.match(/([A-Za-z._/\d])/g)!.length === node.fileName.length
     && node.fileName.match(/\./g)!.length === 1
 , valuesForFileName,
 sourceMapForNodeName)
diff --git a/src/wre/game.ts b/src/wre/game.ts
index f54301da..e56f64f2 100644
--- a/src/wre/game.ts
+++ b/src/wre/game.ts
@@ -181,4 +181,4 @@ const game: Natives = {
   },
 }
 
-export default game
+export default game
\ No newline at end of file