diff --git a/ext/lib/crypto/mbedtls/configs/config-coap.h b/ext/lib/crypto/mbedtls/configs/config-coap.h
index e92b3456fb8..1dd09925956 100644
--- a/ext/lib/crypto/mbedtls/configs/config-coap.h
+++ b/ext/lib/crypto/mbedtls/configs/config-coap.h
@@ -95,7 +95,11 @@
  * both ends of the connection!  (See comments in "mbedtls/ssl.h".)
  * The optimal size here depends on the typical size of records.
  */
-#define MBEDTLS_SSL_MAX_CONTENT_LEN             256
+#ifndef CONFIG_COAP_MBEDTLS_SSL_MAX_CONTENT_LEN
+#define MBEDTLS_SSL_MAX_CONTENT_LEN	1500
+#else
+#define MBEDTLS_SSL_MAX_CONTENT_LEN	CONFIG_COAP_MBEDTLS_SSL_MAX_CONTENT_LEN
+#endif
 
 #include "mbedtls/check_config.h"
 
diff --git a/samples/net/coaps_client/prj.conf b/samples/net/coaps_client/prj.conf
index 4fc6728ae02..e69d9242f73 100644
--- a/samples/net/coaps_client/prj.conf
+++ b/samples/net/coaps_client/prj.conf
@@ -21,6 +21,7 @@ CONFIG_MBEDTLS_BUILTIN=y
 CONFIG_MBEDTLS_CFG_FILE="config-coap.h"
 
 CONFIG_COAP=y
+CONFIG_COAP_MBEDTLS_SSL_MAX_CONTENT_LEN=256
 
 CONFIG_NET_APP_SETTINGS=y
 CONFIG_NET_APP_MY_IPV6_ADDR="2001:db8::3"
diff --git a/samples/net/coaps_server/prj.conf b/samples/net/coaps_server/prj.conf
index 5a322a4efeb..626bbbaee24 100644
--- a/samples/net/coaps_server/prj.conf
+++ b/samples/net/coaps_server/prj.conf
@@ -17,6 +17,7 @@ CONFIG_NET_IF_MCAST_IPV6_ADDR_COUNT=5
 CONFIG_NET_MAX_CONTEXTS=10
 
 CONFIG_COAP=y
+CONFIG_COAP_MBEDTLS_SSL_MAX_CONTENT_LEN=256
 
 CONFIG_MBEDTLS=y
 CONFIG_MBEDTLS_BUILTIN=y
diff --git a/subsys/net/lib/coap/Kconfig b/subsys/net/lib/coap/Kconfig
index 1bc6de6781b..a6c9ea98463 100644
--- a/subsys/net/lib/coap/Kconfig
+++ b/subsys/net/lib/coap/Kconfig
@@ -62,6 +62,16 @@ config COAP_EXTENDED_OPTIONS_LEN_VALUE
 	  COAP_EXTENDED_OPTIONS_LEN is enabled. Define the value according to
 	  user requirement.
 
+config COAP_MBEDTLS_SSL_MAX_CONTENT_LEN
+	int "CoAP MBEDTLS maximum content length value"
+	default 1500
+	range 256 16384
+	depends on MBEDTLS
+	help
+	  This option sets the value of the MBEDTLS_SSL_MAX_CONTENT_LEN option
+	  in ext/lib/crypto/mbedtls/configs/config-coap.h  For client/server
+	  communication to work these values need to be the same on both sides.
+
 config NET_DEBUG_COAP
 	bool "Debug COAP"
 	default n