diff --git a/src/lwip/silabs/lwipopts-rs911x.h b/src/lwip/silabs/lwipopts-rs911x.h
index f5d8e3d6b12129..c4a7addb27f0fe 100644
--- a/src/lwip/silabs/lwipopts-rs911x.h
+++ b/src/lwip/silabs/lwipopts-rs911x.h
@@ -68,8 +68,12 @@
 #ifdef DIC_ENABLE
 #define LWIP_DNS 1
 #define DNS_RAND_TXID() ((u32_t) rand())
+#define TCP_MSS (4 * 1152)
+#define TCPIP_THREAD_PRIO (3)
 #else
 #define LWIP_DNS 0
+#define TCP_MSS (1152)
+#define TCPIP_THREAD_PRIO (2)
 #endif /* DIC_ENABLE */
 
 #define LWIP_FREERTOS_USE_STATIC_TCPIP_TASK 1
@@ -130,7 +134,6 @@
 #define PBUF_CUSTOM_POOL_IDX_START (MEMP_PBUF_POOL_SMALL)
 #define PBUF_CUSTOM_POOL_IDX_END (MEMP_PBUF_POOL_LARGE)
 
-#define TCP_MSS (1152)
 #define TCP_SND_BUF (2 * TCP_MSS)
 #define TCP_LISTEN_BACKLOG (1)
 
@@ -140,8 +143,6 @@
 
 #define TCPIP_THREAD_STACKSIZE (2048)
 
-#define TCPIP_THREAD_PRIO (2)
-
 #define NETIF_MAX_HWADDR_LEN 8U
 
 #define LWIP_IPV6_NUM_ADDRESSES 5
diff --git a/src/platform/silabs/efr32/efr32-chip-mbedtls-config.h b/src/platform/silabs/efr32/efr32-chip-mbedtls-config.h
index 35ff27436ed88b..536cba392c578a 100644
--- a/src/platform/silabs/efr32/efr32-chip-mbedtls-config.h
+++ b/src/platform/silabs/efr32/efr32-chip-mbedtls-config.h
@@ -42,6 +42,26 @@
 #define MBEDTLS_SSL_OUT_CONTENT_LEN 1560
 #define MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF
 #define MBEDTLS_MPI_MAX_SIZE 512
+#define MBEDTLS_CTR_DRBG_C
+#define MBEDTLS_NO_PLATFORM_ENTROPY
+#define MBEDTLS_ENTROPY_HARDWARE_ALT
+#define MBEDTLS_SSL_TLS_C
+#define MBEDTLS_SSL_CLI_C
+#define MBEDTLS_SSL_PROTO_TLS1_2
+#define MBEDTLS_SSL_KEEP_PEER_CERTIFICATE
+#define MBEDTLS_SSL_PROTO_DTLS
+#define MBEDTLS_CIPHER_MODE_CBC
+#define MBEDTLS_CCM_C
+#define MBEDTLS_ECJPAKE_C
+#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
+#define MBEDTLS_SSL_MAX_CONTENT_LEN 768
+
+/**
+ * Enable H Crypto and Entropy modules
+ */
+#define MBEDTLS_ECDH_C
+#define MBEDTLS_ENTROPY_C
+
 #endif // DIC_ENABLE
 
 // Configurations necessary for ot coap cert libs
diff --git a/third_party/silabs/SiWx917_sdk.gni b/third_party/silabs/SiWx917_sdk.gni
index 8d649dd8490f5c..b138ef10c57537 100644
--- a/third_party/silabs/SiWx917_sdk.gni
+++ b/third_party/silabs/SiWx917_sdk.gni
@@ -237,6 +237,10 @@ template("siwx917_sdk") {
       defines += [ "DIC_ENABLE=1" ]
     }
 
+    if (aws_sdk_ota) {
+      defines += [ "ENABLE_AWS_OTA_FEAT=1" ]
+    }
+
     libs += [ "${sdk_support_root}/platform/emdrv/nvm3/lib/libnvm3_CM4_gcc.a" ]
 
     cflags = []
diff --git a/third_party/silabs/efr32_sdk.gni b/third_party/silabs/efr32_sdk.gni
index 5b4238b47d6473..2295bd5e14f9fd 100644
--- a/third_party/silabs/efr32_sdk.gni
+++ b/third_party/silabs/efr32_sdk.gni
@@ -690,6 +690,10 @@ template("efr32_sdk") {
     if (enable_dic) {
       sources += [
         "${chip_root}/third_party/silabs/mqtt/stack/mqtt.c",
+        "${efr32_sdk_root}/util/third_party/mbedtls/library/ctr_drbg.c",
+        "${efr32_sdk_root}/util/third_party/mbedtls/library/entropy.c",
+        "${efr32_sdk_root}/util/third_party/mbedtls/library/entropy_poll.c",
+        "${efr32_sdk_root}/util/third_party/mbedtls/library/rsa.c",
         "${efr32_sdk_root}/util/third_party/mbedtls/library/rsa_alt_helpers.c",
       ]
     }