diff --git a/Gemfile.lock b/Gemfile.lock
index 6881fb1..6c2e4fa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,13 +104,12 @@ GEM
     erubi (1.13.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
-    grape (2.0.0)
-      activesupport (>= 5)
-      builder
+    grape (2.1.1)
+      activesupport (>= 6)
       dry-types (>= 1.1)
-      mustermann-grape (~> 1.0.0)
-      rack (>= 1.3.0)
-      rack-accept
+      mustermann-grape (~> 1.1.0)
+      rack (>= 2)
+      zeitwerk
     grape-entity (1.0.1)
       activesupport (>= 3.0.0)
       multi_json (>= 1.3.2)
@@ -141,7 +140,7 @@ GEM
     multi_json (1.15.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    mustermann-grape (1.0.2)
+    mustermann-grape (1.1.0)
       mustermann (>= 1.0.0)
     net-imap (0.4.13)
       date
@@ -175,9 +174,7 @@ GEM
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.8.0)
-    rack (3.1.3)
-    rack-accept (0.4.5)
-      rack (>= 0.4)
+    rack (3.1.4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)