diff --git a/ngspice.spec b/ngspice.spec
index b65e603..61b80f7 100644
--- a/ngspice.spec
+++ b/ngspice.spec
@@ -13,22 +13,22 @@
 %global	userelease	1
 %endif
 
-%global	majorver	44
+%global	majorver	45
 %global	minorver	2
-%global	docver	44
+%global	docver	45
 %undefine	prever
 %global	prerpmver	%(echo "%{?prever}" | sed -e 's|-||g')
 
 %global	baserelease	1
 
 %if 0%{?usegitbare} >= 1
-# pre-master-42
-%global	gitcommit	c87df54f24969de0c9d503c349258d9953ae208a
-%global	gitdate	20231111
+# pre-master-45
+%global	gitcommit	1d0beb5e266420b1dd756913356a295ddb60fdce
+%global	gitdate	20250830
 %global	shortcommit	%(c=%{gitcommit}; echo ${c:0:7})
 
-%global	tarballdate	20231112
-%global	tarballtime	1636
+%global	tarballdate	20250831
+%global	tarballtime	2034
 %endif
 
 %if	0%{?userelease} >= 1
@@ -141,7 +141,7 @@ It can be used for VLSI simulations as well.
 
 %package -n	tclspice
 Summary:	Tcl/Tk interface for ngspice
-BuildRequires:	tk-devel
+BuildRequires:	pkgconfig(tk) <= 8.999
 BuildRequires:	blt-devel
 
 %description -n	tclspice
@@ -222,7 +222,7 @@ for nonUTF8 in \
 	ChangeLog \
 	%{nil}
 do
-	%{_bindir}/iconv -f ISO-8859-1 -t utf-8 $nonUTF8 > $nonUTF8.conv
+	iconv -f ISO-8859-1 -t utf-8 $nonUTF8 > $nonUTF8.conv
 	%{__mv} -f $nonUTF8.conv $nonUTF8
 done
 git commit -m "Change files to UTF8" -a
@@ -286,7 +286,7 @@ cd %{name}
 
 # ---- Tclspice ----------------------------------------------------------------
 # Adding BLT support
-export CFLAGS="%{optflags} -I%{_includedir}/blt"
+export CFLAGS="%{optflags} -I$(pkg-config --variable=includedir tcl)/blt"
 
 # Make builddir for tclspice
 %{__mkdir} -p tclspice
@@ -326,11 +326,11 @@ export CPPFLAGS=-DUSE_INTERP_RESULT
 	--enable-predictor \
 	--enable-shared \
 	--with-readline=yes \
-	--with-tcl=%{_libdir}/ \
+	--with-tcl=$(pkg-config --variable=libdir tcl) \
 	--libdir=%{_libdir}/tclspice \
 	%{nil}
 
-%{__make} -k
+%make_build -k
 # Once install to the temp dir
 rm -rf $(pwd)/../INST-TCLSPICE
 %{__make} INSTALL="install -p" install DESTDIR=$(pwd)/../INST-TCLSPICE
@@ -372,8 +372,7 @@ do
 	%{nil}
 
 %{__make} clean
-# No parallel make
-%{__make} -k
+%make_build -k
 # Once install to the temp dir
 rm -rf $(pwd)/INST-NGSPICE-${opt}
 %{__make} INSTALL="install -p" install DESTDIR=$(pwd)/INST-NGSPICE-${opt}
@@ -501,6 +500,21 @@ popd
 %{_includedir}/ngspice/
 
 %changelog
+* Sun Sep 07 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 45.2-1
+- Update to 45.2
+
+* Tue Sep 02 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 45-1
+- Update to 45
+
+* Thu Jul 24 2025 Fedora Release Engineering <releng@fedoraproject.org> - 44.2-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Fri Jan 31 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 44.2-3
+- Use tk8 explicitly
+
+* Fri Jan 17 2025 Fedora Release Engineering <releng@fedoraproject.org> - 44.2-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
 * Sun Jan 12 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 44.2-1
 - Update to 44.2
 
diff --git a/sources b/sources
index 2000db3..a6f3db9 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (ngspice-44.2.tar.gz) = b6cccf38d460f9aace5379db3b75c247b3aed04b902a2355e27b4ee3a64206b0ac8828c8685da3bf8e57c0746c10f39418849a4f31563e9f5ff7c05de0eb3ae2
-SHA512 (ngspice-44-manual.pdf) = 544d33ef43e0856a156e3b55e1fc68559aa99d36e857d8a0036963ca26ed4c56da9fc7bf6616fae8e75bec399aa2c848872b883bf1bb671995fb82c565e3ff8b
+SHA512 (ngspice-45.2.tar.gz) = 4090e9433457c0b49dc1e7561bc630a5c6a340391f26be8142c6bd514ae13b72137589964fe9ae5a01069c9de7d8457bd41b0811a335b2c93a3c6e07044b35b1
+SHA512 (ngspice-45-manual.pdf) = 425d9320a01d409c7baab83d111f92643cae7df62a109e06d7e4fd366262441f4fdd62532db63fb4d4af4cb98e478b4f9fca5bd6c63fb89507dba685220f34ab