diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index a597cb93ff..a00096ee58 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    ethon (0.11.0)
+    ethon (0.12.0)
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)