diff --git a/Gemfile.lock b/Gemfile.lock
index 146951f..ae14eb2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -322,7 +322,7 @@ GEM
     simplecov-html (0.12.3)
     simplecov-lcov (0.9.0)
     simplecov_json_formatter (0.1.4)
-    spring (4.2.1)
+    spring (4.5.0)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)