diff --git a/ts/client/scripts/mm/params/default.json b/ts/client/scripts/mm/params/default.json
index 19993574d..e166f5e26 100644
--- a/ts/client/scripts/mm/params/default.json
+++ b/ts/client/scripts/mm/params/default.json
@@ -5,7 +5,7 @@
   "assets": {
     "BTC": {
       "perp": {
-        "sizePerc": 1,
+        "sizePerc": 0.5,
         "leanCoeff": 0.00025,
         "bias": 0.0,
         "requoteThresh": 0.0002,
@@ -16,7 +16,7 @@
     },
     "SOL": {
       "perp": {
-        "sizePerc": 1,
+        "sizePerc": 0.5,
         "leanCoeff": 0.00025,
         "bias": 0.0,
         "requoteThresh": 0.0002,