diff --git a/installer/README.md b/installer/README.md
index c10cae8..c1f8a66 100644
--- a/installer/README.md
+++ b/installer/README.md
@@ -83,7 +83,7 @@ In `braiins` mode, the installer provisions Braiins Farm Proxy (`farm-proxy` and
 - The miner container uses `APS_MINER_SUBNET_POOL_NAME` (default: `central-proxy`) to select which pool gets absolute `target_hashrate`.
 - The selected pool name must exist in `proxy/pools.toml`; otherwise no subnet target update is applied.
 - During installation, if `proxy/pools.toml` does not exist yet, the script asks for backup/private pool host/port and writes those values to `pools.backup`.
-- Installer default sets `[extranonce].extranonce2_size = 5` to stay compatible with pools that expose `extranonce2_size = 6` and require one extra bridge byte.
+- Installer default sets `[extranonce].extranonce2_size = 2`.
 - After updating `proxy/pools.toml`, APS miner touches reload sentinel `APS_MINER_IHP_RELOAD_SENTINEL` (default: `/root/src/proxy/.reload-ihp`); sidecar `ihp-proxy-reloader` then runs `kill -HUP 1` in `ihp-proxy` PID namespace.
 
 `braiins` mode:
diff --git a/installer/miner_install.sh b/installer/miner_install.sh
index 14a6a50..5fd8ea6 100644
--- a/installer/miner_install.sh
+++ b/installer/miner_install.sh
@@ -58,7 +58,7 @@ port = 9332
 weight = 1
 
 [extranonce]
-extranonce2_size = 5
+extranonce2_size = 2
 
 [routing]
 rebalance_interval_seconds = 10