diff --git a/Gemfile.lock b/Gemfile.lock
index 79e8a59..0b479fe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    base64 (0.2.0)
+    base64 (0.3.0)
     benchmark (0.4.1)
     benchmark-ips (2.14.0)
     byebug (11.1.3)