diff --git a/docker-image/v1.18/debian-kafka2/Gemfile.lock b/docker-image/v1.18/debian-kafka2/Gemfile.lock
index 98a351489..3863363aa 100644
--- a/docker-image/v1.18/debian-kafka2/Gemfile.lock
+++ b/docker-image/v1.18/debian-kafka2/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.7)
-      public_suffix (>= 2.0.2, < 7.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     avro (1.12.0)
       multi_json (~> 1.0)
     base64 (0.3.0)
@@ -110,7 +110,7 @@ GEM
     ostruct (0.6.2)
     prometheus-client (4.2.4)
       base64
-    public_suffix (6.0.2)
+    public_suffix (7.0.5)
     rake (13.3.0)
     rdkafka (0.11.1)
       ffi (~> 1.15)