diff --git a/Gemfile.lock b/Gemfile.lock
index 09abbe7..cf04c0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     ast (2.4.3)
     base64 (0.3.0)
     benchmark (0.4.1)
-    bigdecimal (3.3.1)
+    bigdecimal (4.0.1)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -219,7 +219,7 @@ CHECKSUMS
   ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
   base64 (0.3.0) sha256=27337aeabad6ffae05c265c450490628ef3ebd4b67be58257393227588f5a97b
   benchmark (0.4.1) sha256=d4ef40037bba27f03b28013e219b950b82bace296549ec15a78016552f8d2cce
-  bigdecimal (3.3.1) sha256=eaa01e228be54c4f9f53bf3cc34fe3d5e845c31963e7fcc5bedb05a4e7d52218
+  bigdecimal (4.0.1) sha256=8b07d3d065a9f921c80ceaea7c9d4ae596697295b584c296fe599dd0ad01c4a7
   coffee-script (2.4.1) sha256=82fe281e11b93c8117b98c5ea8063e71741870f1c4fbb27177d7d6333dd38765
   coffee-script-source (1.12.2) sha256=e12b16fd8927fbbf8b87cb2e9a85a6cf457c6881cc7ff8b1af15b31f70da07a4
   concurrent-ruby (1.3.5) sha256=813b3e37aca6df2a21a3b9f1d497f8cbab24a2b94cab325bffe65ee0f6cbebc6