diff --git a/Gemfile.lock b/Gemfile.lock
index ef43f40e..108a9912 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -598,10 +598,8 @@ GEM
       rack (>= 0.9.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    bitters (0.10.0)
-      bourbon (>= 3.2)
-      sass (>= 3.2)
-      thor
+    bitters (2.0.3)
+      thor (~> 0.19)
     bourbon (3.2.3)
       sass (~> 3.2)
       thor