diff --git a/Gemfile.lock b/Gemfile.lock
index aa7be02..135a377 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -121,7 +121,7 @@ GEM
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     strscan (3.1.5)
-    thor (1.3.2)
+    thor (1.4.0)
     tilt (2.6.0)
     trmnl_preview (0.5.4)
       actionview (~> 8.0)