diff --git a/README.Rmd b/README.Rmd
index 8ef85285c..843950fd3 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -158,7 +158,7 @@ As system libraries, 'libnng' is available as libnng-dev (deb) or nng-devel (rpm
 
 For R >= 4.2 using the 'Rtools42' or newer toolchains, 'libnng' v1.10.1 and 'libmbedtls' v3.6.2 will be automatically compiled from the package sources during installation.
 
-For previous R versions, pre-compiled 'libnng' v1.9.0 and 'libmbedtls' v3.5.2 libraries are downloaded and used for installation instead.
+For previous R versions, pre-compiled 'libnng' v1.10.1 and 'libmbedtls' v3.6.2 libraries are downloaded and used for installation instead.
 
 ### Acknowledgements and Links
 
diff --git a/README.md b/README.md
index 9af9fd1d9..4efb34a00 100644
--- a/README.md
+++ b/README.md
@@ -205,8 +205,8 @@ For R \>= 4.2 using the ‘Rtools42’ or newer toolchains, ‘libnng’ v1.10.1
 and ‘libmbedtls’ v3.6.2 will be automatically compiled from the package
 sources during installation.
 
-For previous R versions, pre-compiled ‘libnng’ v1.9.0 and ‘libmbedtls’
-v3.5.2 libraries are downloaded and used for installation instead.
+For previous R versions, pre-compiled ‘libnng’ v1.10.1 and ‘libmbedtls’
+v3.6.2 libraries are downloaded and used for installation instead.
 
 ### Acknowledgements and Links
 
diff --git a/src/Makevars.win b/src/Makevars.win
index 404694242..61176d026 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -4,12 +4,12 @@ else
     ARC="i386"
 endif
 
-PKG_CFLAGS=-I../src-${ARC}/rwinlib-1.9.0_3.5.2/include -DNNG_STATIC_LIB $(C_VISIBILITY)
-PKG_LIBS=-L../src-${ARC}/rwinlib-1.9.0_3.5.2/lib${R_ARCH} -lnng -lmbedtls -lmbedx509 -lmbedcrypto -lbcrypt -lws2_32
+PKG_CFLAGS=-I../src-${ARC}/rwinlib-1.10.1_3.6.2/include -DNNG_STATIC_LIB $(C_VISIBILITY)
+PKG_LIBS=-L../src-${ARC}/rwinlib-1.10.1_3.6.2/lib${R_ARCH} -lnng -lmbedtls -lmbedx509 -lmbedcrypto -lbcrypt -lws2_32
 
 all: winlibs
 
 winlibs:
-	curl -sL https://github.com/shikokuchuo/rwinlib/archive/refs/tags/v1.9.0_3.5.2.zip -o nng.zip
+	curl -sL https://github.com/shikokuchuo/rwinlib/archive/refs/tags/v1.10.1_3.6.2.zip -o nng.zip
 	unzip -q nng.zip
 	rm -f nng.zip