diff --git a/cm-0.4.2.tar.gz b/cm-0.4.2.tar.gz
new file mode 100644
index 0000000..fddabf3
--- /dev/null
+++ b/cm-0.4.2.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7c61a3a03759c875f4e0882603b7a6f3b7915b0688194c812b3a0f1e3900d5b0
+size 749482
diff --git a/cm-0.4.2.tar.gz.asc b/cm-0.4.2.tar.gz.asc
new file mode 100644
index 0000000..db17e2c
--- /dev/null
+++ b/cm-0.4.2.tar.gz.asc
@@ -0,0 +1,7 @@
+-----BEGIN PGP SIGNATURE-----
+
+iHUEABEIAB0WIQStF6Ie+K7Y8cwC29n31cm/dlxh4wUCZGUPugAKCRD31cm/dlxh
+4+F5AQCbb+17Hd8yXR6sZCwS/Y5riuo6nevu3XtUKS3CtRwnqgD/SoRTu8gV1Wpb
+V6SmQAR/nd2AD2rWoXT8nJ3U8+C5P+c=
+=DFYv
+-----END PGP SIGNATURE-----
diff --git a/cm-b2b8d4bda97b158aad539d50b8fda8571db5ead6.tar.gz b/cm-b2b8d4bda97b158aad539d50b8fda8571db5ead6.tar.gz
deleted file mode 100644
index 5470442..0000000
--- a/cm-b2b8d4bda97b158aad539d50b8fda8571db5ead6.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d6b5132c316b82b15f1cec0f7f5f6b6006340e138142f5ebd79d9698b092bad3
-size 235302
diff --git a/cm.changes b/cm.changes
index 6e9745a..716fe3d 100644
--- a/cm.changes
+++ b/cm.changes
@@ -1,3 +1,22 @@
+-------------------------------------------------------------------
+Sat Jun 24 14:42:15 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 0.4.2
+  * When ECPP certificates are output to a file, a second file in
+    Primo format is created automatically.
+  * ECPP certificate creation uses class field towers
+    unconditionally.
+  * An optional primality test is carried out before starting ECPP.
+  * For larger numbers, the BPSW primality test of GMP is replaced
+    by a Miller-Rabin test to base 2.
+  * New command line options make it possible to compute only the
+    first or only the second phase.
+  * Phase 2 results are stored in any order as they come in, which
+    requires the file format to change. Checkpoint files ending in
+    .cert2 from previous releases are not compatible.
+  * Add an optional dependency on FLINT to speed up root finding
+    in the second ECPP phase.
+
 -------------------------------------------------------------------
 Sat Aug 27 06:27:27 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/cm.spec b/cm.spec
index eda00a9..693faac 100644
--- a/cm.spec
+++ b/cm.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package cm
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,17 +17,17 @@
 
 
 Name:           cm
-Version:        0.4.0+gb2b8d4bd
+Version:        0.4.2
 Release:        0
 Summary:        Class polynomial computation via floating point approximations
 License:        GPL-3.0-or-later
 Group:          Productivity/Scientific/Math
 URL:            https://www.multiprecision.org/cm/
 #Git-Clone:     https://gitlab.inria.fr/enge/cm
-Source:         https://gitlab.inria.fr/enge/cm/-/archive/b2b8d4bda97b158aad539d50b8fda8571db5ead6/cm-b2b8d4bda97b158aad539d50b8fda8571db5ead6.tar.gz
-#Source:        http://www.multiprecision.org/downloads/%name-%version.tar.gz
-#Source2:        http://www.multiprecision.org/downloads/%name-%version.tar.gz.asc
+Source:         http://www.multiprecision.org/downloads/%name-%version.tar.gz
+Source2:        http://www.multiprecision.org/downloads/%name-%version.tar.gz.asc
 Source3:        %name.keyring
+BuildRequires:  flint-devel
 BuildRequires:  gmp-devel >= 4.3.2
 BuildRequires:  libtool
 BuildRequires:  makeinfo
@@ -45,7 +45,7 @@ multiplication via floating point approximations.
 %package devel
 Summary:        Development files for the CM computation software
 Group:          Development/Libraries/C and C++
-Requires:       libcm0 = %version-%release
+Requires:       libcm1 = %version-%release
 Requires:       mpc-devel
 Requires:       mpfrcx-devel
 Requires:       zlib-devel
@@ -57,11 +57,11 @@ multiplication via floating point approximations.
 
 This subpackage provides the development headers for it.
 
-%package -n libcm0
+%package -n libcm1
 Summary:        Multi-precision floating-point interval arithmetic computation library
 Group:          System/Libraries
 
-%description -n libcm0
+%description -n libcm1
 The CM software implements the construction of ring class fields of
 imaginary quadratic number fields and of elliptic curves with complex
 multiplication via floating point approximations.
@@ -69,7 +69,7 @@ multiplication via floating point approximations.
 It includes libraries that can be called from within a C program.
 
 %prep
-%autosetup -p1 -n cm-b2b8d4bda97b158aad539d50b8fda8571db5ead6
+%autosetup -p1
 
 %build
 autoreconf -fi
@@ -86,8 +86,8 @@ if ! %make_build check; then
 	exit 1
 fi
 
-%post   -n libcm0 -p /sbin/ldconfig
-%postun -n libcm0 -p /sbin/ldconfig
+%post   -n libcm1 -p /sbin/ldconfig
+%postun -n libcm1 -p /sbin/ldconfig
 
 %post
 %install_info --info-dir="%_infodir" "%_infodir/cm.info.gz"
@@ -106,7 +106,7 @@ fi
 %_includedir/cm*.h
 %_libdir/libcm*.so
 
-%files -n libcm0
-%_libdir/libcm.so.0*
+%files -n libcm1
+%_libdir/libcm.so.1*
 
 %changelog