diff --git a/mingw-w64-python-gmpy2/PKGBUILD b/mingw-w64-python-gmpy2/PKGBUILD
index 6ebefba9ef..80296cf77c 100644
--- a/mingw-w64-python-gmpy2/PKGBUILD
+++ b/mingw-w64-python-gmpy2/PKGBUILD
@@ -3,7 +3,7 @@
 _realname=gmpy2
 pkgbase=mingw-w64-python-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-python2-${_realname}"  "${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
-pkgver=2.1.0a4
+pkgver=2.1.0b1
 pkgrel=1
 pkgdesc="Provides C-coded Python modules for fast multiple-precision arithmetic. (mingw-w64)"
 arch=('any')
@@ -15,9 +15,9 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-mpc"
              "${MINGW_PACKAGE_PREFIX}-python3-setuptools"
              "${MINGW_PACKAGE_PREFIX}-python2-setuptools")
 options=('staticlibs' 'strip' '!debug')
-source=("${_realname}-${pkgver}.tar.gz"::"https://github.com/aleaxit/gmpy/archive/${_realname}-${pkgver/.0/}.tar.gz")
+source=("${_realname}-${pkgver}.tar.gz"::"https://github.com/aleaxit/gmpy/archive/${_realname}-${pkgver}.tar.gz")
 noextract=("${_realname}-$pkgver.tar.gz")
-sha256sums=('747404f0a6a92f87767a5c1ef593f1a2fd1c9b2b180b70a5f77b4e5fa7db088b')
+sha256sums=('888d3c34a91c2ac068ac5033431c765e04f125e85920bd69d8739fbb62f4279d')
 
 # Helper macros to help make tasks easier #
 apply_patch_with_msg() {
@@ -44,13 +44,13 @@ prepare() {
 # at least if you don't have admin privilleges.  This is just a workaround
 # for that.
   tar zxf "${_realname}-${pkgver}.tar.gz" || true
-  pushd "gmpy-${_realname}-${pkgver/.0/}"
+  pushd "gmpy-${_realname}-${pkgver}"
   cp src/gmpy2.h gmpy2/gmpy2.h
   cp src/gmpy2.pxd gmpy2/gmpy2.pxd
   popd
   for builddir in python{2,3}-build-${CARCH}; do
     rm -rf ${builddir} | true
-    cp -r "gmpy-${_realname}-${pkgver/.0/}" "${builddir}"
+    cp -r "gmpy-${_realname}-${pkgver}" "${builddir}"
   done
   # Set version for setuptools_scm
   export SETUPTOOLS_SCM_PRETEND_VERSION=${pkgver}