diff --git a/Gemfile.lock b/Gemfile.lock
index eb8c184e3..8e3e10cb3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -293,7 +293,7 @@ GEM
     discard (1.2.0)
       activerecord (>= 4.2, < 7)
     docile (1.3.5)
-    doorkeeper (5.4.0)
+    doorkeeper (5.6.6)
       railties (>= 5)
     down (5.2.0)
       addressable (~> 2.5)