diff --git a/fluent-plugin-enhance-k8s-metadata/Gemfile.lock b/fluent-plugin-enhance-k8s-metadata/Gemfile.lock
index 5f9109e..d5bde0f 100644
--- a/fluent-plugin-enhance-k8s-metadata/Gemfile.lock
+++ b/fluent-plugin-enhance-k8s-metadata/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
       connection_pool (~> 2.2)
     power_assert (2.0.3)
     public_suffix (5.0.3)
-    rake (13.0.6)
+    rake (13.1.0)
     recursive-open-struct (1.1.3)
     rexml (3.2.6)
     ruby2_keywords (0.0.5)