diff --git a/Gemfile.lock b/Gemfile.lock
index 39550ea..7cf2df4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,7 +6,7 @@ PATH
       carrierwave (~> 1.0.0)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     activemodel (5.0.2)
       activesupport (= 5.0.2)
@@ -28,7 +28,7 @@ GEM
     concurrent-ruby (1.0.5)
     diff-lcs (1.1.3)
     docile (1.1.5)
-    ffi (1.9.18)
+    ffi (1.13.1)
     formatador (0.2.5)
     guard (2.14.1)
       formatador (>= 0.2.4)