diff --git a/Gemfile.lock b/Gemfile.lock
index 294af4b..379305e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
       ruby2_keywords
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    net-ldap (0.17.1)
+    net-ldap (0.18.0)
     nio4r (2.5.9)
     nio4r (2.5.9-java)
     opentelemetry-api (1.1.0)