diff --git a/Gemfile.lock b/Gemfile.lock
index 6aad334..e0e441f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -156,7 +156,9 @@ GEM
       connection_pool (~> 2.2, >= 2.2.0)
       rack-protection (>= 1.5.0)
       redis (~> 3.2, >= 3.2.1)
-    simple_form (3.4.0)
+    simple_form (5.0.0)
+      actionpack (>= 5.0)
+      activemodel (>= 5.0)
     slim (3.0.8)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 1.3.3, < 2.1)