diff --git a/examples/simple/Gemfile.lock b/examples/simple/Gemfile.lock
index b652cba..5f0b588 100644
--- a/examples/simple/Gemfile.lock
+++ b/examples/simple/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.3)
-    crass (1.0.4)
+    crass (1.0.6)
     debug_inspector (0.0.3)
     erubis (2.7.0)
     execjs (2.7.0)
@@ -76,18 +76,18 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    loofah (2.2.3)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     mini_mime (1.0.1)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
     multipart-post (2.0.0)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
     public_suffix (3.0.3)
     rack (1.6.11)
     rack-test (0.6.3)