diff --git a/Gemfile.lock b/Gemfile.lock
index d16ad75..040946d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     omniauth-ldap (1.0.2)
       net-ldap (>= 0.3.1)
-      omniauth (~> 1.0)
+      omniauth (>= 1, < 3)
       pyu-ruby-sasl (~> 0.0.3.1)
       rubyntlm (~> 0.1.1)
 
@@ -23,19 +23,22 @@ GEM
       guard (~> 1.1)
     guard-rspec (1.2.1)
       guard (>= 1.1)
-    hashie (1.2.0)
+    hashie (5.0.0)
     libnotify (0.7.4)
       ffi (~> 1.0.11)
     linecache19 (0.5.12)
       ruby_core_source (>= 0.1.4)
     listen (0.5.1)
     multi_json (1.3.6)
-    net-ldap (0.3.1)
-    omniauth (1.1.1)
-      hashie (~> 1.2)
-      rack
+    net-ldap (0.17.1)
+    omniauth (2.1.0)
+      hashie (>= 3.4.6)
+      rack (>= 2.2.3)
+      rack-protection
     pyu-ruby-sasl (0.0.3.3)
-    rack (1.4.1)
+    rack (2.2.4)
+    rack-protection (2.2.2)
+      rack
     rack-test (0.6.1)
       rack (>= 1.0)
     rb-fsevent (0.9.1)
diff --git a/omniauth-ldap.gemspec b/omniauth-ldap.gemspec
index 8a5a4f8..dc9a91d 100644
--- a/omniauth-ldap.gemspec
+++ b/omniauth-ldap.gemspec
@@ -8,7 +8,7 @@ Gem::Specification.new do |gem|
   gem.summary       = %q{A LDAP strategy for OmniAuth.}
   gem.homepage      = "https://github.com/intridea/omniauth-ldap"
 
-  gem.add_runtime_dependency     'omniauth', '~> 1.0'
+  gem.add_runtime_dependency     'omniauth', '>= 1', '< 3'
   gem.add_runtime_dependency     'net-ldap', '>= 0.3.1'
   gem.add_runtime_dependency     'pyu-ruby-sasl', '~> 0.0.3.1'
   gem.add_runtime_dependency     'rubyntlm', '~> 0.1.1'