diff --git a/Gemfile b/Gemfile
index 06cb3866..b9fa978a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ group :test do
 end
 
 group :ldap do
-  gem "net-ldap", '~> 0.3.1'
+  gem "net-ldap", '~> 0.16.0'
 end
 
 group :openid do
diff --git a/Gemfile.lock b/Gemfile.lock
index a0b8208e..92afa6ac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
     multi_json (1.1.0)
     mysql (2.8.1)
     mysql2 (0.2.18)
-    net-ldap (0.3.1)
+    net-ldap (0.16.0)
     nokogiri (1.11.4)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -86,7 +86,7 @@ DEPENDENCIES
   mocha
   mysql
   mysql2 (~> 0.2.7)
-  net-ldap (~> 0.3.1)
+  net-ldap (~> 0.16.0)
   pg
   rails (= 2.3.14)
   rdoc (>= 2.4.2)