diff --git a/package/libcoap/libcoap.hash b/package/libcoap/libcoap.hash
index 17fce990fa..0ca4fd3901 100644
--- a/package/libcoap/libcoap.hash
+++ b/package/libcoap/libcoap.hash
@@ -1,4 +1,4 @@
 # Locally calculated
-sha256  bca78a2076ebb02179f93ab6cf2363b1256d878b540f810c238ea231ad5948ab  libcoap-4.3.5a.tar.gz
+sha256  383a17d8466cee7c1cb1d4dfbffad2651004850b29eb590e9591c7bedd46741d  libcoap-4.3.5b.tar.gz
 sha256  09dd86a017bad210527085008cbf706609c58210897b69845af14099577e7eb7  COPYING
 sha256  1ba383ac337111d18334b2e230d02831b60913d137c3b653585d8e8675824111  LICENSE
diff --git a/package/libcoap/libcoap.mk b/package/libcoap/libcoap.mk
index bb1321f194..21b479fc16 100644
--- a/package/libcoap/libcoap.mk
+++ b/package/libcoap/libcoap.mk
@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBCOAP_VERSION = 4.3.5a
+LIBCOAP_VERSION = 4.3.5b
 LIBCOAP_SITE = $(call github,obgm,libcoap,v$(LIBCOAP_VERSION))
 LIBCOAP_INSTALL_STAGING = YES
 LIBCOAP_LICENSE = BSD-2-Clause