diff --git a/Gemfile.lock b/Gemfile.lock
index 7cbc78c..52119f5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,9 @@ GEM
     connection_pool (2.4.1)
     csv (3.3.0)
     diff-lcs (1.5.1)
-    dnsruby (1.72.2)
+    dnsruby (1.72.4)
+      base64 (~> 0.2.0)
+      logger (~> 1.6.5)
       simpleidn (~> 0.2.1)
     drb (2.2.1)
     em-websocket (0.5.3)
@@ -236,7 +238,7 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    logger (1.6.2)
+    logger (1.6.6)
     mercenary (0.3.6)
     mini_portile2 (2.8.7)
     minima (2.5.1)