diff --git a/Gemfile.lock b/Gemfile.lock
index 4d9a8d4..f15f5d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
     ethon (0.11.0)
       ffi (>= 1.3.0)
     ffi (1.9.25)
-    rake (10.1.0)
+    rake (12.3.3)
     rspec (3.2.0)
       rspec-core (~> 3.2.0)
       rspec-expectations (~> 3.2.0)