diff --git a/Gemfile.lock b/Gemfile.lock
index b7c1b9d..f24987e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.4.4)
-    ffi (1.15.4)
+    ffi (1.15.5)
     rake (13.0.6)
     rgeo (2.3.0)
     rgeo-geojson (2.1.1)