diff --git a/libelperiodic/README b/libelperiodic/README
index bb38171aa..27689e504 100644
--- a/libelperiodic/README
+++ b/libelperiodic/README
@@ -5,42 +5,42 @@ expected to run at constant tick intervals with smallest possible overhead and
 little or no support from the underlying run time environment.
 
 Runtime requirements:
-  cygwin-3.5.0-0.454.g7236f22f713a
-  libelperiodic-devel-1.2-1bl1
-  libelperiodic1-1.2-1bl1
-  libgcc1-11.4.0-1
-  pkg-config-2.0.3-1
+  cygwin-3.5.4-1
+  libelperiodic-devel-1.4-1bl1
+  libelperiodic1-1.4-1bl1
+  libgcc1-12.4.0-3
+  pkg-config-2.3.0-1
 
 Build requirements:
 (besides corresponding -devel packages)
-  autoconf-15-1
-  automake-11-1
-  binutils-2.41-3
-  cygport-0.36.7-1
-  gcc-core-11.4.0-1
-  libtool-2.4.7-1
+  autoconf-15-2
+  automake-20240607-1
+  binutils-2.43.1-1
+  cygport-0.36.9-1
+  gcc-core-12.4.0-3
+  libtool-2.5.3-1
   make-4.4.1-2
 
 Canonical website:
   https://github.com/sobomax/libelperiodic
 
 Canonical download:
-  https://github.com/sobomax/libelperiodic/archive/refs/tags/v1.2.tar.gz
+  https://github.com/sobomax/libelperiodic/archive/refs/tags/v1.4.tar.gz
 
 -------------------------------------------
 
 Build instructions:
-  1. unpack libelperiodic-1.2-X-src.tar.xz
+  1. unpack libelperiodic-1.4-X-src.tar.xz
   2. if you use setup to install this src package,
      it will be unpacked under /usr/src automatically
         % cd /usr/src
-        % cygport ./libelperiodic-1.2-X.cygport all
+        % cygport ./libelperiodic-1.4-X.cygport all
 
 This will create:
-  /usr/src/libelperiodic-1.2-X-src.tar.xz
-  /usr/src/libelperiodic-1.2-X.tar.xz
-  /usr/src/libelperiodic1-1.2-X.tar.xz
-  /usr/src/libelperiodic-devel-1.2-X.tar.xz
+  /usr/src/libelperiodic-1.4-X-src.tar.xz
+  /usr/src/libelperiodic-1.4-X.tar.xz
+  /usr/src/libelperiodic1-1.4-X.tar.xz
+  /usr/src/libelperiodic-devel-1.4-X.tar.xz
 
 -------------------------------------------
 
@@ -64,5 +64,8 @@ Files included in the binary package:
 
 Port Notes:
 
+----- version 1.4-1bl1 -----
+Version bump.
+
 ----- version 1.2-1bl1 -----
 Initial release by fd0 <https://github.com/fd00/>
diff --git a/libelperiodic/libelperiodic-1.2-1bl1.src.patch b/libelperiodic/libelperiodic-1.2-1bl1.src.patch
deleted file mode 100644
index 29afef167..000000000
--- a/libelperiodic/libelperiodic-1.2-1bl1.src.patch
+++ /dev/null
@@ -1,47 +0,0 @@
---- origsrc/libelperiodic-1.2/Makefile.am	2020-12-01 02:39:27.000000000 +0900
-+++ src/libelperiodic-1.2/Makefile.am	2023-11-09 11:19:17.659153200 +0900
-@@ -22,3 +22,6 @@ uninstall-local:
- 	cat $(DESTDIR)$(pkgpythondir)/install_files.txt | xargs rm -rf
- 	rm -rf $(DESTDIR)$(pkgpythondir)
- endif
-+
-+pkgconfigdir = $(libdir)/pkgconfig
-+pkgconfig_DATA = $(PACKAGE).pc
---- origsrc/libelperiodic-1.2/configure.ac	2020-12-01 02:39:27.000000000 +0900
-+++ src/libelperiodic-1.2/configure.ac	2023-11-09 14:31:43.483549400 +0900
-@@ -1,4 +1,4 @@
--AC_INIT(libelperiodic, [m4_esyscmd_s([git rev-parse --abbrev-ref HEAD])], [sobomax@sippysoft.com])
-+AC_INIT(libelperiodic, [1.2], [sobomax@sippysoft.com])
- 
- AM_INIT_AUTOMAKE
- AM_MAINTAINER_MODE([disable])
-@@ -31,3 +31,4 @@ AC_SUBST(RT_LIB)
- AM_CONDITIONAL([HAVE_PYTHON], [test "$PYTHON" != :])
- 
- AC_OUTPUT(Makefile src/Makefile)
-+AC_OUTPUT([libelperiodic.pc])
---- origsrc/libelperiodic-1.2/libelperiodic.pc.in	1970-01-01 09:00:00.000000000 +0900
-+++ src/libelperiodic-1.2/libelperiodic.pc.in	2023-11-09 11:19:17.612286000 +0900
-@@ -0,0 +1,10 @@
-+prefix=@prefix@
-+exec_prefix=@exec_prefix@
-+libdir=@libdir@
-+includedir=@includedir@
-+
-+Name: libelperiodic
-+Description: Library to run frequent periodic tasks
-+Version: @VERSION@
-+Libs: -L${libdir} -lelperiodic
-+Cflags: -I${includedir}
---- origsrc/libelperiodic-1.2/src/Makefile.am	2020-12-01 02:39:27.000000000 +0900
-+++ src/libelperiodic-1.2/src/Makefile.am	2023-11-09 08:21:50.958506200 +0900
-@@ -8,8 +8,7 @@ libelperiodic_la_SOURCES = periodic.c pr
-   prdic_sign_ctx.h prdic_sign_impl.h prdic_band.h src/prdic_inst.h \
-   src/prdic_time.h
- libelperiodic_la_DEPENDENCIES = Symbol.map
--libelperiodic_la_CFLAGS = -g3 -O0 -fPIC
--libelperiodic_la_LDFLAGS = -version-info 1 -Wl,--version-script=$(srcdir)/Symbol.map -lm @RT_LIB@
-+libelperiodic_la_LDFLAGS = -no-undefined -version-info 1 -Wl,--version-script=$(srcdir)/Symbol.map -lm @RT_LIB@
- 
- noinst_PROGRAMS = testskew # gpdrive_test
- testskew_SOURCES = testskew.c
diff --git a/libelperiodic/libelperiodic-1.2-1bl1.cygport b/libelperiodic/libelperiodic-1.4-1bl1.cygport
similarity index 97%
rename from libelperiodic/libelperiodic-1.2-1bl1.cygport
rename to libelperiodic/libelperiodic-1.4-1bl1.cygport
index c6de38b2f..204136f4e 100644
--- a/libelperiodic/libelperiodic-1.2-1bl1.cygport
+++ b/libelperiodic/libelperiodic-1.4-1bl1.cygport
@@ -12,6 +12,7 @@ LICENSE_SPDX="SPDX-License-Identifier: BSD-2-Clause"
 LICENSE_URI="COPYING"
 
 CYGCONF_ARGS="
+	--enable-maintainer-mode
 	--without-python
 "
 
diff --git a/libelperiodic/libelperiodic-1.4-1bl1.src.patch b/libelperiodic/libelperiodic-1.4-1bl1.src.patch
new file mode 100644
index 000000000..1b12e8ede
--- /dev/null
+++ b/libelperiodic/libelperiodic-1.4-1bl1.src.patch
@@ -0,0 +1,58 @@
+--- origsrc/libelperiodic-1.4/Makefile.am	2024-07-31 02:31:24.000000000 +0900
++++ src/libelperiodic-1.4/Makefile.am	2025-01-10 14:31:28.995914600 +0900
+@@ -22,3 +22,6 @@ uninstall-local:
+ 	cat $(DESTDIR)$(pkgpythondir)/install_files.txt | xargs rm -rf
+ 	rm -rf $(DESTDIR)$(pkgpythondir)
+ endif
++
++pkgconfigdir = $(libdir)/pkgconfig
++pkgconfig_DATA = $(PACKAGE).pc
+--- origsrc/libelperiodic-1.4/configure.ac	2024-07-31 02:31:24.000000000 +0900
++++ src/libelperiodic-1.4/configure.ac	2025-01-10 14:31:29.000938500 +0900
+@@ -1,4 +1,4 @@
+-AC_INIT([libelperiodic],[m4_esyscmd_s([git rev-parse --abbrev-ref HEAD])],[sobomax@sippysoft.com])
++AC_INIT([libelperiodic],[1.4],[sobomax@sippysoft.com])
+ 
+ AM_INIT_AUTOMAKE
+ AM_MAINTAINER_MODE([disable])
+@@ -8,7 +8,7 @@ AC_PROG_CC
+ 
+ LT_INIT
+ 
+-mydef_version=`git describe --always --dirty || date "+%Y%m%d%H%M%S"`
++mydef_version="1.4"
+ AC_DEFINE_UNQUOTED([VERSION_GIT], ["$mydef_version"])
+ 
+ AC_ARG_ENABLE(coverage,
+@@ -34,4 +34,5 @@ AM_CONDITIONAL(ENABLE_LTO, [test "x${ENA
+ AM_CONDITIONAL([HAVE_PYTHON], [test "$PYTHON" != :])
+ 
+ AC_CONFIG_FILES([Makefile src/Makefile])
++AC_CONFIG_FILES([libelperiodic.pc])
+ AC_OUTPUT
+--- origsrc/libelperiodic-1.4/libelperiodic.pc.in	1970-01-01 09:00:00.000000000 +0900
++++ src/libelperiodic-1.4/libelperiodic.pc.in	2025-01-10 14:31:28.979810400 +0900
+@@ -0,0 +1,10 @@
++prefix=@prefix@
++exec_prefix=@exec_prefix@
++libdir=@libdir@
++includedir=@includedir@
++
++Name: libelperiodic
++Description: Library to run frequent periodic tasks
++Version: @VERSION@
++Libs: -L${libdir} -lelperiodic
++Cflags: -I${includedir}
+--- origsrc/libelperiodic-1.4/src/Makefile.am	2024-07-31 02:31:24.000000000 +0900
++++ src/libelperiodic-1.4/src/Makefile.am	2025-01-10 14:19:37.943310300 +0900
+@@ -12,8 +12,8 @@ libelperiodic_la_SOURCES = periodic.c pr
+   prdic_sign_ctx.h prdic_sign_impl.h prdic_band.h src/prdic_inst.h \
+   src/prdic_time.h
+ libelperiodic_la_DEPENDENCIES = Symbol.map
+-libelperiodic_la_CFLAGS = -g3 -O0 -fPIC ${LTO_FLAG}
+-libelperiodic_la_LDFLAGS = ${LTO_FLAG} -version-info 1 -Wl,--version-script=$(srcdir)/Symbol.map -lm @RT_LIB@
++libelperiodic_la_CFLAGS = -fPIC ${LTO_FLAG}
++libelperiodic_la_LDFLAGS = -no-undefined ${LTO_FLAG} -version-info 1 -Wl,--version-script=$(srcdir)/Symbol.map -lm @RT_LIB@
+ 
+ noinst_PROGRAMS = testskew
+ testskew_SOURCES = testskew.c