diff --git a/package/rwmem/Config.in b/package/rwmem/Config.in
index cd9a7f78f1..690b034070 100644
--- a/package/rwmem/Config.in
+++ b/package/rwmem/Config.in
@@ -1,6 +1,6 @@
 config BR2_PACKAGE_RWMEM
 	bool "rwmem"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # C++20
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR # fmt
 	select BR2_PACKAGE_FMT
@@ -10,6 +10,6 @@ config BR2_PACKAGE_RWMEM
 
 	  https://github.com/tomba/rwmem
 
-comment "rwmem needs a toolchain w/ C++, wchar, gcc >= 5"
+comment "rwmem needs a toolchain w/ C++, wchar, gcc >= 10"
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_5
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_10
diff --git a/package/rwmem/rwmem.hash b/package/rwmem/rwmem.hash
index 9becbc5b21..da74002cb4 100644
--- a/package/rwmem/rwmem.hash
+++ b/package/rwmem/rwmem.hash
@@ -1,2 +1,2 @@
-sha256  55d28f029c0cd5c21d3e1c89371e2905d5217f571ef5389ed0fce163804d1c4a  rwmem-c8291705c82bb0686be9adf6a427a2b72114719a.tar.gz
+sha256  e6cb76b77869aef9ec4a2c31d0d80af0182a5f9c9c3ae06225c8fb2f8266379f  rwmem-c89bc9ad9a8f2359f358c510db57b7678eb156d1.tar.gz
 sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  LICENSE
diff --git a/package/rwmem/rwmem.mk b/package/rwmem/rwmem.mk
index 24c4e92efc..d6ef05193b 100644
--- a/package/rwmem/rwmem.mk
+++ b/package/rwmem/rwmem.mk
@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-RWMEM_VERSION = c8291705c82bb0686be9adf6a427a2b72114719a
+RWMEM_VERSION = c89bc9ad9a8f2359f358c510db57b7678eb156d1
 RWMEM_SITE = $(call github,tomba,rwmem,$(RWMEM_VERSION))
 RWMEM_LICENSE = GPL-2.0
 RWMEM_LICENSE_FILES = LICENSE