diff --git a/go.mod b/go.mod
index 4f9d40c..5decf18 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/mainflux/coap-cli
 
 go 1.12
 
-require github.com/dustin/go-coap v0.0.0-20170214053734-ddcc80675fa4
+require github.com/dustin/go-coap v0.0.0-20190908170653-752e0f79981e
diff --git a/go.sum b/go.sum
index 0d6a4a4..08eddd1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
 github.com/dustin/go-coap v0.0.0-20170214053734-ddcc80675fa4 h1:+3t0PiNl/W3Cl4/+XmQ8gD1HQuw3ISaGHHmSBylNVJ8=
 github.com/dustin/go-coap v0.0.0-20170214053734-ddcc80675fa4/go.mod h1:as2rZ2aojRzZF8bGx1bPAn1yi9ICG6LwkiPOj6PBtjc=
+github.com/dustin/go-coap v0.0.0-20190908170653-752e0f79981e h1:oppjHFVTardH+VyOD32F9uBtgT5Wd/qVqEGcwj389Lc=
+github.com/dustin/go-coap v0.0.0-20190908170653-752e0f79981e/go.mod h1:as2rZ2aojRzZF8bGx1bPAn1yi9ICG6LwkiPOj6PBtjc=
diff --git a/vendor/github.com/dustin/go-coap/message.go b/vendor/github.com/dustin/go-coap/message.go
index 630ad2f..7a824b1 100644
--- a/vendor/github.com/dustin/go-coap/message.go
+++ b/vendor/github.com/dustin/go-coap/message.go
@@ -210,7 +210,7 @@ var optionDefs = [256]optionDef{
 }
 
 // MediaType specifies the content type of a message.
-type MediaType byte
+type MediaType uint16
 
 // Content types.
 const (
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 2f1d707..98ff8d3 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,2 +1,2 @@
-# github.com/dustin/go-coap v0.0.0-20170214053734-ddcc80675fa4
+# github.com/dustin/go-coap v0.0.0-20190908170653-752e0f79981e
 github.com/dustin/go-coap