diff --git a/Gemfile.lock b/Gemfile.lock
index 606d684..8192429 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,7 +78,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     commonjs (0.2.7)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.7)
     connection_pool (2.2.1)
     diff-lcs (1.3)
     dotenv (2.2.1)
@@ -131,7 +131,7 @@ GEM
     powerpack (0.1.1)
     public_suffix (2.0.5)
     puma (3.9.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-protection (2.0.0)
       rack
     rack-test (0.6.3)
@@ -213,7 +213,7 @@ GEM
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
       spring (>= 1.2, < 3.0)
-    sprockets (3.7.1)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.0)