1 files changed, 1 insertions, 1 deletions
diff --git a/src/v1.erl b/src/v1.erl
index 9f454fc..2814cb6 100644
--- a/src/v1.erl
+++ b/src/v1.erl
@@ -4,7 +4,7 @@
  get_roots/3, get_entry_and_proof/3]).
 -export([hello/3]).
 -include("$CTROOT/plop/include/plop.hrl").
--define(PROTOCOL_VERSION, 1).
+-define(PROTOCOL_VERSION, 0).
 
 %% Public functions.
 add_chain(SessionID, _Env, Input) ->