diff --git a/docker-image/v0.12/debian-graylog/Gemfile.lock b/docker-image/v0.12/debian-graylog/Gemfile.lock
index 76db5df44..62000f601 100644
--- a/docker-image/v0.12/debian-graylog/Gemfile.lock
+++ b/docker-image/v0.12/debian-graylog/Gemfile.lock
@@ -1,14 +1,14 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.2)
+    activesupport (7.0.4.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
-    concurrent-ruby (1.1.3)
+    concurrent-ruby (1.2.0)
     cool.io (1.5.3)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
@@ -52,7 +52,7 @@ GEM
       domain_name (~> 0.5)
     http-form_data (1.0.3)
     http_parser.rb (0.6.0)
-    i18n (1.1.1)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     json (2.1.0)
     kubeclient (1.1.4)
@@ -64,7 +64,7 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    minitest (5.11.3)
+    minitest (5.17.0)
     msgpack (1.2.4)
     netrc (0.11.0)
     oj (3.5.1)
@@ -80,9 +80,8 @@ GEM
     string-scrub (0.0.5)
     systemd-journal (1.3.3)
       ffi (~> 1.9)
-    thread_safe (0.3.6)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     tzinfo-data (1.2018.7)
       tzinfo (>= 1.0.0)
     unf (0.1.4)