diff --git a/src/server/poolserver/Stratum/ShareLimiter.cpp b/src/server/poolserver/Stratum/ShareLimiter.cpp
index 03041f3..3b5e580 100644
--- a/src/server/poolserver/Stratum/ShareLimiter.cpp
+++ b/src/server/poolserver/Stratum/ShareLimiter.cpp
@@ -22,7 +22,7 @@ namespace Stratum
         _lastRetarget = curTime;
         
         // Check if miner is ok
-        if (_totalShares > 50 && (double(_totalBadShares)/double(_totalShares)) > 0.8) {
+        if (_totalShares > 200 && (double(_totalBadShares)/double(_totalShares)) > 0.9) {
             _client->Ban(600);
             return false;
         }