diff --git a/lib/cryptcheck/tls/server.rb b/lib/cryptcheck/tls/server.rb
index d2febe2..98b6298 100644
--- a/lib/cryptcheck/tls/server.rb
+++ b/lib/cryptcheck/tls/server.rb
@@ -51,7 +51,7 @@ module CryptCheck
 			end
 
 			def cipher_size
-				supported_ciphers.collect { |c| c.size }.sort.last
+				supported_ciphers.collect { |c| c.size }.min
 			end
 
 			def supported_protocols