diff --git a/build-scripts/ESP32-A1S-sdkconfig.defaults b/build-scripts/ESP32-A1S-sdkconfig.defaults
index 15009ef0..d78bce05 100644
--- a/build-scripts/ESP32-A1S-sdkconfig.defaults
+++ b/build-scripts/ESP32-A1S-sdkconfig.defaults
@@ -626,8 +626,8 @@ CONFIG_LWIP_MAX_SOCKETS=16
 CONFIG_LWIP_SO_REUSE=y
 CONFIG_LWIP_SO_REUSE_RXTOALL=y
 #CONFIG_LWIP_IP_REASSEMBLY is not set
-CONFIG_LWIP_IP6_REASSEMBLY=Y
-CONFIG_LWIP_IP4_REASSEMBLY=Y
+CONFIG_LWIP_IP6_REASSEMBLY=y
+CONFIG_LWIP_IP4_REASSEMBLY=y
 CONFIG_LWIP_ESP_GRATUITOUS_ARP=y
 CONFIG_LWIP_GARP_TMR_INTERVAL=60
 CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=32
diff --git a/build-scripts/I2S-4MFlash-sdkconfig.defaults b/build-scripts/I2S-4MFlash-sdkconfig.defaults
index 76ba8b49..7a0c93a7 100644
--- a/build-scripts/I2S-4MFlash-sdkconfig.defaults
+++ b/build-scripts/I2S-4MFlash-sdkconfig.defaults
@@ -460,8 +460,8 @@ CONFIG_LWIP_SO_REUSE_RXTOALL=y
 # CONFIG_LWIP_STATS is not set
 # CONFIG_LWIP_ETHARP_TRUST_IP_MAC is not set
 #CONFIG_LWIP_IP_REASSEMBLY is not set
-CONFIG_LWIP_IP6_REASSEMBLY=Y
-CONFIG_LWIP_IP4_REASSEMBLY=Y
+CONFIG_LWIP_IP6_REASSEMBLY=y
+CONFIG_LWIP_IP4_REASSEMBLY=y
 CONFIG_LWIP_ESP_GRATUITOUS_ARP=y
 CONFIG_LWIP_GARP_TMR_INTERVAL=60
 CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=32
diff --git a/build-scripts/SqueezeAmp-sdkconfig.defaults b/build-scripts/SqueezeAmp-sdkconfig.defaults
index 20fc4520..c1fee36e 100644
--- a/build-scripts/SqueezeAmp-sdkconfig.defaults
+++ b/build-scripts/SqueezeAmp-sdkconfig.defaults
@@ -456,8 +456,8 @@ CONFIG_LWIP_MAX_SOCKETS=16
 CONFIG_LWIP_SO_REUSE=y
 CONFIG_LWIP_SO_REUSE_RXTOALL=y
 #CONFIG_LWIP_IP_REASSEMBLY is not set
-CONFIG_LWIP_IP6_REASSEMBLY=Y
-CONFIG_LWIP_IP4_REASSEMBLY=Y
+CONFIG_LWIP_IP6_REASSEMBLY=y
+CONFIG_LWIP_IP4_REASSEMBLY=y
 CONFIG_LWIP_ESP_GRATUITOUS_ARP=y
 CONFIG_LWIP_GARP_TMR_INTERVAL=60
 CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=32