diff --git a/src/nodes/package-declaration.js b/src/nodes/package-declaration.js
index b794b6a..39a753f 100644
--- a/src/nodes/package-declaration.js
+++ b/src/nodes/package-declaration.js
@@ -5,10 +5,9 @@ const {
 } = require("prettier");
 
 module.exports = (path, opts, print) => {
-  const packageName = path
-    .getValue()
-    .pkg.names.join(".")
-    .toLowerCase();
+  const {
+    pkg: { names: names }
+  } = path.getValue();
 
-  return concat(["package ", packageName, literalline, literalline]);
+  return concat(["package ", names.join("."), literalline, literalline]);
 };
diff --git a/src/nodes/package-declaration.spec.js b/src/nodes/package-declaration.spec.js
index 17bb6ab..efc29f3 100644
--- a/src/nodes/package-declaration.spec.js
+++ b/src/nodes/package-declaration.spec.js
@@ -12,8 +12,8 @@ describe("package-declaration", () => {
       "package com.github.thing.app\n"
     ));
 
-  test("uppercase", () =>
-    expect("package COM.github.thing.APP").toChangeFormat(
-      "package com.github.thing.app\n"
+  test("differing cases", () =>
+    expect("package COM.gitHub.thing.APP").toChangeFormat(
+      "package COM.gitHub.thing.APP\n"
     ));
 });