diff --git a/lib/grenache/http.rb b/lib/grenache/http.rb
index ec52547..9ddef17 100644
--- a/lib/grenache/http.rb
+++ b/lib/grenache/http.rb
@@ -40,7 +40,7 @@ def start_http_service(port, &block)
             verify_peer: true
           }
 
-          server.backend.ca_cert = File.read config.ca
+          server.backend.ca_cert = config.ca
         end
         server.start
       }
diff --git a/lib/grenache/http/http_server.rb b/lib/grenache/http/http_server.rb
index d092732..f5a6649 100644
--- a/lib/grenache/http/http_server.rb
+++ b/lib/grenache/http/http_server.rb
@@ -15,8 +15,7 @@ def ssl_verify_peer cert
     private
     def store
        @store ||= OpenSSL::X509::Store.new.tap do |store|
-         root = OpenSSL::X509::Certificate.new backend.ca_cert
-         store.add_cert root
+         store.add_file backend.ca_cert
        end
     end
   end
diff --git a/lib/grenache/http/version.rb b/lib/grenache/http/version.rb
index f71c227..0cfae34 100644
--- a/lib/grenache/http/version.rb
+++ b/lib/grenache/http/version.rb
@@ -1,5 +1,5 @@
 module Grenache
   module HTTP
-    VERSION = "0.2.13"
+    VERSION = "0.2.14"
   end
 end