diff --git a/lib/lookup_http.rb b/lib/lookup_http.rb
index 432aa8b..abf7cb8 100644
--- a/lib/lookup_http.rb
+++ b/lib/lookup_http.rb
@@ -21,15 +21,15 @@ def initialize(opts={})
       else
         @http.verify_mode = OpenSSL::SSL::VERIFY_PEER
       end
-
+      
       if @config[:ssl_cert]
-        store = OpenSSL::X509::Store.new
-        store.add_cert(OpenSSL::X509::Certificate.new(File.read(@config[:ssl_ca_cert])))
-        @http.cert_store = store
-
-        @http.key = OpenSSL::PKey::RSA.new(File.read(@config[:ssl_cert]))
-        @http.cert = OpenSSL::X509::Certificate.new(File.read(@config[:ssl_key]))
-      end
+        @http.cert = OpenSSL::X509::Certificate.new(File.read(@config[:ssl_cert]))
+        @http.key = OpenSSL::PKey::RSA.new(File.read(@config[:ssl_key]))
+      end 
+      
+      if @config[:ssl_ca_cert]
+        @http.ca_file = @config[:ssl_ca_cert]
+      end       
     else
       @http.use_ssl = false
     end