diff --git a/transport/coap/src/main/resources/tb-coap-transport.yml b/transport/coap/src/main/resources/tb-coap-transport.yml
index 11f4e91141..23b1555c73 100644
--- a/transport/coap/src/main/resources/tb-coap-transport.yml
+++ b/transport/coap/src/main/resources/tb-coap-transport.yml
@@ -97,6 +97,8 @@ transport:
     dtls:
       # Enable/disable DTLS 1.2 support
       enabled: "${COAP_DTLS_ENABLED:false}"
+      # RFC7925_RETRANSMISSION_TIMEOUT_IN_MILLISECONDS = 9000
+      retransmission_timeout_in_sec: "${DTLS_RETRANSMISSION_TIMEOUT:9}"
       # CoAP DTLS bind address
       bind_address: "${COAP_DTLS_BIND_ADDRESS:0.0.0.0}"
       # CoAP DTLS bind port
diff --git a/transport/lwm2m/src/main/resources/tb-lwm2m-transport.yml b/transport/lwm2m/src/main/resources/tb-lwm2m-transport.yml
index 0f28100385..2da3032183 100644
--- a/transport/lwm2m/src/main/resources/tb-lwm2m-transport.yml
+++ b/transport/lwm2m/src/main/resources/tb-lwm2m-transport.yml
@@ -103,6 +103,10 @@ transport:
     enabled: "${TB_TRANSPORT_LOG_ENABLED:true}"
     max_length: "${TB_TRANSPORT_LOG_MAX_LENGTH:1024}"
   # Local LwM2M transport parameters
+  coap:
+    dtls:
+      # RFC7925_RETRANSMISSION_TIMEOUT_IN_MILLISECONDS = 9000
+      retransmission_timeout_in_sec: "${DTLS_RETRANSMISSION_TIMEOUT:9}"
   lwm2m:
     # Enable/disable lvm2m transport protocol.
     enabled: "${LWM2M_ENABLED:true}"