diff --git a/DESCRIPTION b/DESCRIPTION
index b056909d1..ef3769021 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: nanonext
 Type: Package
 Title: NNG (Nanomsg Next Gen) Lightweight Messaging Library
-Version: 1.4.0.9000
+Version: 1.4.0.9001
 Description: R binding for NNG (Nanomsg Next Gen), a successor to ZeroMQ. NNG is
     a socket library implementing 'Scalability Protocols', a reliable,
     high-performance standard for common communications patterns including
diff --git a/NEWS.md b/NEWS.md
index 380eec33c..cba848e3e 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,8 +1,9 @@
-# nanonext 1.4.0.9000 (development)
+# nanonext 1.4.0.9001 (development)
 
 #### Updates
 
 * Removes partial matching from using `$`, `[[` or `[` on an object inheriting from class 'nano'.
+* Updates bundled 'libnng' to v1.10.0 pre-release.
 
 # nanonext 1.4.0
 
diff --git a/README.Rmd b/README.Rmd
index 533b7baaf..477ac58ec 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -146,7 +146,7 @@ install.packages("nanonext", repos = "https://shikokuchuo.r-universe.dev")
 
 #### Linux / Mac / Solaris
 
-Installation from source requires 'libnng' >= v1.6.0 and 'libmbedtls' >= 2.5.0 (suitable installations are automatically detected), or else 'cmake' to compile 'libnng' v1.9.0 and 'libmbedtls' v3.5.2 included within the package sources.
+Installation from source requires 'libnng' >= v1.6.0 and 'libmbedtls' >= 2.5.0 (suitable installations are automatically detected), or else 'cmake' to compile 'libnng' v1.10.0 pre-release and 'libmbedtls' v3.5.2 included within the package sources.
 
 **It is recommended for optimal performance and stability to let the package automatically compile bundled versions of 'libmbedtls' and 'libnng' during installation.** To ensure the libraries are compiled from source even if system installations are present, set the `NANONEXT_LIBS` environment variable prior to installation e.g. by `Sys.setenv(NANONEXT_LIBS = 1)`.
 
@@ -156,7 +156,7 @@ As system libraries, 'libnng' is available as libnng-dev (deb) or nng-devel (rpm
 
 #### Windows
 
-For R >= 4.2 using the 'Rtools42' or newer toolchains, 'libnng' v1.9.0 and 'libmbedtls' v3.5.2 will be automatically compiled from the package sources during installation.
+For R >= 4.2 using the 'Rtools42' or newer toolchains, 'libnng' v1.10.0 pre-release and 'libmbedtls' v3.5.2 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.
 
diff --git a/README.md b/README.md
index fa0cc033c..74741bbac 100644
--- a/README.md
+++ b/README.md
@@ -178,8 +178,8 @@ install.packages("nanonext", repos = "https://shikokuchuo.r-universe.dev")
 
 Installation from source requires ‘libnng’ \>= v1.6.0 and ‘libmbedtls’
 \>= 2.5.0 (suitable installations are automatically detected), or else
-‘cmake’ to compile ‘libnng’ v1.9.0 and ‘libmbedtls’ v3.5.2 included
-within the package sources.
+‘cmake’ to compile ‘libnng’ v1.10.0 pre-release and ‘libmbedtls’ v3.5.2
+included within the package sources.
 
 **It is recommended for optimal performance and stability to let the
 package automatically compile bundled versions of ‘libmbedtls’ and
@@ -201,9 +201,9 @@ OpenCSW - refer to the ‘cmake’ website for the latest source file.*
 
 #### Windows
 
-For R \>= 4.2 using the ‘Rtools42’ or newer toolchains, ‘libnng’ v1.9.0
-and ‘libmbedtls’ v3.5.2 will be automatically compiled from the package
-sources during installation.
+For R \>= 4.2 using the ‘Rtools42’ or newer toolchains, ‘libnng’ v1.10.0
+pre-release and ‘libmbedtls’ v3.5.2 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.
diff --git a/configure b/configure
index 8a3f555a9..16fc9306f 100755
--- a/configure
+++ b/configure
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # Library versions
-LIB_VER="190"
+LIB_VER="7643626"
 TLS_VER="daca7a3"
 
 # Initialise
diff --git a/configure.ucrt b/configure.ucrt
index e61d3cb77..dd587c253 100755
--- a/configure.ucrt
+++ b/configure.ucrt
@@ -1,5 +1,5 @@
 # Library versions
-LIB_VER="190"
+LIB_VER="7643626"
 TLS_VER="daca7a3"
 
 tar -xf src/mbedtls-$TLS_VER.tar.xz
diff --git a/src/nng-190.tar.xz b/src/nng-190.tar.xz
deleted file mode 100644
index b5af9da2b..000000000
Binary files a/src/nng-190.tar.xz and /dev/null differ
diff --git a/src/nng-7643626.tar.xz b/src/nng-7643626.tar.xz
new file mode 100644
index 000000000..cc3fa0867
Binary files /dev/null and b/src/nng-7643626.tar.xz differ