diff --git a/examples/platform/silabs/SiWx917/FreeRTOSConfig.h b/examples/platform/silabs/SiWx917/FreeRTOSConfig.h
index 31ed4e04533108..cfbc571454a209 100644
--- a/examples/platform/silabs/SiWx917/FreeRTOSConfig.h
+++ b/examples/platform/silabs/SiWx917/FreeRTOSConfig.h
@@ -190,7 +190,7 @@ See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
 
 #ifndef configTOTAL_HEAP_SIZE
 #ifdef DIC_ENABLE
-#define configTOTAL_HEAP_SIZE ((size_t)(44 * 1024))
+#define configTOTAL_HEAP_SIZE ((size_t)(50 * 1024))
 #else
 #define configTOTAL_HEAP_SIZE ((size_t)(34 * 1024))
 #endif // DIC_ENABLE
diff --git a/examples/platform/silabs/efr32/FreeRTOSConfig.h b/examples/platform/silabs/efr32/FreeRTOSConfig.h
index e9ebd8a94dd39a..4cad6b1e9803dc 100644
--- a/examples/platform/silabs/efr32/FreeRTOSConfig.h
+++ b/examples/platform/silabs/efr32/FreeRTOSConfig.h
@@ -209,7 +209,7 @@ See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
 #ifndef configTOTAL_HEAP_SIZE
 #ifdef SL_WIFI
 #ifdef DIC_ENABLE
-#define configTOTAL_HEAP_SIZE ((size_t)(50 * 1024))
+#define configTOTAL_HEAP_SIZE ((size_t)(56 * 1024))
 #else
 #define configTOTAL_HEAP_SIZE ((size_t)(34 * 1024))
 #endif // DIC
diff --git a/src/lwip/silabs/lwipopts-rs911x.h b/src/lwip/silabs/lwipopts-rs911x.h
index 19396b5e05a520..f67cf862fb7cb0 100644
--- a/src/lwip/silabs/lwipopts-rs911x.h
+++ b/src/lwip/silabs/lwipopts-rs911x.h
@@ -65,6 +65,13 @@
 
 #define LWIP_SOCKET 0
 
+#ifdef DIC_ENABLE
+#define LWIP_DNS 1
+#define DNS_RAND_TXID() ((u32_t) rand())
+#else
+#define LWIP_DNS 0
+#endif /* DIC_ENABLE */
+
 #define LWIP_FREERTOS_USE_STATIC_TCPIP_TASK 1
 
 #define LWIP_RAW 1
diff --git a/src/lwip/silabs/lwipopts-wf200.h b/src/lwip/silabs/lwipopts-wf200.h
index 13231c647061e9..67a38eadef0265 100644
--- a/src/lwip/silabs/lwipopts-wf200.h
+++ b/src/lwip/silabs/lwipopts-wf200.h
@@ -66,7 +66,13 @@
 #define LWIP_SOCKET 0
 
 #ifdef DIC_ENABLE
+#define LWIP_DNS 1
+#define DNS_RAND_TXID() ((u32_t) rand())
 #define MEM_SIZE 5632
+#define MEMP_NUM_UDP_PCB (6)
+#else
+#define LWIP_DNS 0
+#define MEMP_NUM_UDP_PCB (5)
 #endif // DIC_ENABLE
 
 #define LWIP_FREERTOS_USE_STATIC_TCPIP_TASK 1
@@ -74,8 +80,6 @@
 #define LWIP_RAW 1
 #define MEMP_NUM_RAW_PCB (4)
 
-#define MEMP_NUM_UDP_PCB (5)
-
 #define LWIP_HAVE_LOOPIF (0)
 
 // TODO: not sure why this is disabled
diff --git a/third_party/silabs/efr32_sdk.gni b/third_party/silabs/efr32_sdk.gni
index 8803d087df4558..ddedbb2be5ed3a 100644
--- a/third_party/silabs/efr32_sdk.gni
+++ b/third_party/silabs/efr32_sdk.gni
@@ -240,6 +240,7 @@ template("efr32_sdk") {
 
     if (defined(invoker.chip_enable_wifi) && invoker.chip_enable_wifi) {
       if (enable_dic) {
+        assert(chip_enable_wifi_ipv4, "enable chip_enable_wifi_ipv4")
         defines += [ "DIC_ENABLE=1" ]
       }
       if (chip_enable_wifi_ipv4) {
@@ -288,7 +289,6 @@ template("efr32_sdk") {
             "LWIP_ICMP=1",
             "LWIP_IGMP=1",
             "LWIP_DHCP=1",
-            "LWIP_DNS=0",
           ]
         } else {
           defines += [ "LWIP_IPV4=0" ]