diff --git a/build_scripts/Windows-msys2/build/build.bat b/build_scripts/Windows-msys2/build/build.bat
index bf68f3e20..e72ab3d1d 100644
--- a/build_scripts/Windows-msys2/build/build.bat
+++ b/build_scripts/Windows-msys2/build/build.bat
@@ -22,7 +22,7 @@ if not "%ParamNoupdate%"=="1" (
 	%EnvMSYS2Cmd% "pacman --noconfirm --needed -S mingw-w64-%RsMSYS2Architecture%-json-c mingw-w64-%RsMSYS2Architecture%-libbotan"
 
 	:: Webui
-	if "%ParamWebui%"=="1" %EnvMSYS2Cmd% "pacman --noconfirm --needed -S mingw-w64-%RsMSYS2Architecture%-doxygen"
+	if "%ParamWebui%"=="1" %EnvMSYS2Cmd% "pacman --noconfirm --needed -S mingw-w64-%RsMSYS2Architecture%-doxygen mingw-w64-%RsMSYS2Architecture%-asio"
 
 	:: Plugins
 	if "%ParamPlugins%"=="1" %EnvMSYS2Cmd% "pacman --noconfirm --needed -S mingw-w64-%RsMSYS2Architecture%-speex mingw-w64-%RsMSYS2Architecture%-speexdsp mingw-w64-%RsMSYS2Architecture%-curl mingw-w64-%RsMSYS2Architecture%-libxslt mingw-w64-%RsMSYS2Architecture%-opencv mingw-w64-%RsMSYS2Architecture%-ffmpeg"
diff --git a/build_scripts/Windows/build-libs/Makefile b/build_scripts/Windows/build-libs/Makefile
index 534356914..f1649d91f 100644
--- a/build_scripts/Windows/build-libs/Makefile
+++ b/build_scripts/Windows/build-libs/Makefile
@@ -13,6 +13,7 @@ LIBMICROHTTPD_VERSION=0.9.75
 FFMPEG_VERSION=4.4
 RAPIDJSON_VERSION=1.1.0
 XAPIAN_VERSION=1.4.19
+ASIO_VERSION=1-34-2
 #RNP_VERSION=0.17.1
 
 # libaries for rnp
@@ -23,7 +24,7 @@ DOWNLOAD_PATH?=download
 BUILD_PATH=build
 LIBS_PATH?=libs
 
-all: dirs zlib bzip2 miniupnpc openssl speex speexdsp libxml2 libxslt curl sqlcipher libmicrohttpd ffmpeg rapidjson xapian jsonc botan copylibs
+all: dirs zlib bzip2 miniupnpc openssl speex speexdsp libxml2 libxslt curl sqlcipher libmicrohttpd ffmpeg rapidjson xapian jsonc botan asio copylibs
 #rnp
 
 download: \
@@ -398,6 +399,20 @@ $(BUILD_PATH)/botan-$(BOTAN_VERSION):
 	rm -r -f botan-$(BOTAN_VERSION)
 	mv $(BUILD_PATH)/botan-$(BOTAN_VERSION).tmp $(BUILD_PATH)/botan-$(BOTAN_VERSION)
 
+asio: $(BUILD_PATH)/asio-$(ASIO_VERSION)
+
+$(BUILD_PATH)/asio-$(ASIO_VERSION):
+	# prepare
+	rm -r -f $(BUILD_PATH)/asio-*
+	[ -d "asio-$(ASIO_VERSION)" ] || git clone https://github.com/chriskohlhoff/asio.git --depth=1 --branch asio-$(ASIO_VERSION) "asio-$(ASIO_VERSION)"
+	# copy files
+	mkdir -p $(BUILD_PATH)/asio-$(ASIO_VERSION).tmp/include/asio
+	cp asio-$(ASIO_VERSION)/asio/include/*.hpp $(BUILD_PATH)/asio-$(ASIO_VERSION).tmp/include/
+	cp -r asio-$(ASIO_VERSION)/asio/include/asio/* $(BUILD_PATH)/asio-$(ASIO_VERSION).tmp/include/asio/
+	# cleanup
+	rm -r -f asio-$(ASIO_VERSION)
+	mv $(BUILD_PATH)/asio-$(ASIO_VERSION).tmp $(BUILD_PATH)/asio-$(ASIO_VERSION)
+
 rnp: $(BUILD_PATH)/rnp-$(RNP_VERSION)
 
 $(BUILD_PATH)/rnp-$(RNP_VERSION):
diff --git a/retroshare.pri b/retroshare.pri
index 2e8bb729a..18207838d 100644
--- a/retroshare.pri
+++ b/retroshare.pri
@@ -520,6 +520,18 @@ trough qmake command line arguments!")
     }
 }
 
+# Some supportlibs compilation won't start if the intstalled CMAKE verison is >=3.5.
+# Force compilation in that case
+CMAKE_FORCE_MINVERSION=""
+CMAKE_VERSION_SPLIT = $$system(cmake --version)
+CMAKE_VERSION_SPLIT = $$split(CMAKE_VERSION_SPLIT, \\s+)
+CMAKE_VERSION = $$member(CMAKE_VERSION_SPLIT, 2)
+message("Cmake version detected: $${CMAKE_VERSION}")
+versionAtLeast(CMAKE_VERSION, 3.5) {
+    warning("Forcing compilation with CMAKE_POLICY_VERSION_MINIMUM=3.5")
+    CMAKE_FORCE_MINVERSION="-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
+}
+
 gxsdistsync:DEFINES *= RS_USE_GXS_DISTANT_SYNC
 wikipoos:DEFINES *= RS_USE_WIKI
 rs_gxs:DEFINES *= RS_ENABLE_GXS