diff --git a/src/controller.cpp b/src/controller.cpp
index acb290f..c2e7328 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -321,7 +321,7 @@ void Controller::getInfoThenRefresh(bool force)
         bool doUpdate            = force || (model->getLatestBlock() != curBlock);
         int difficulty           = reply["difficulty"].get<json::number_integer_t>();
         int num_halvings         = 1; // number of halvings that have occured already
-        int blocks_until_halving = (num_halvings*1680000 + 340000) - curBlock;
+        int blocks_until_halving = (num_halvings*3500000) - curBlock;
         int blocktime            = 36;
         int halving_days         = (blocks_until_halving * blocktime) / (60 * 60 * 24) ;
         int longestchain         = reply["longestchain"].get<json::number_integer_t>();