diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
index 83bafdffa6fa0aa0fef5ed8f0f38b37a7bb93ea3..1e73f4214f799662bf1edce473e1cfe17a8fb6b7 100755
--- a/build-aux/gitlog-to-changelog
+++ b/build-aux/gitlog-to-changelog
@@ -3,13 +3,13 @@ eval '(exit $?0)' && eval 'exec perl -wS "$0" "$@"'
     if 0;
 # Convert git log output to ChangeLog format.
 
-my $VERSION = '2016-03-22 21:49'; # UTC
+my $VERSION = '2018-03-07 03:47'; # UTC
 # The definition above must lie within the first 8 lines in order
 # for the Emacs time-stamp write hook (at end) to update it.
 # If you change this file with Emacs, please let the write hook
 # do its job.  Otherwise, update this string manually.
 
-# Copyright (C) 2008-2016 Free Software Foundation, Inc.
+# Copyright (C) 2008-2018 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -22,7 +22,7 @@ my $VERSION = '2016-03-22 21:49'; # UTC
 # GNU General Public License for more details.
 
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 # Written by Jim Meyering
 
@@ -33,7 +33,7 @@ use POSIX qw(strftime);
 
 (my $ME = $0) =~ s|.*/||;
 
-# use File::Coda; # http://meyering.net/code/Coda/
+# use File::Coda; # https://meyering.net/code/Coda/
 END {
   defined fileno STDOUT or return;
   close STDOUT and return;
@@ -491,7 +491,7 @@ sub git_dir_option($)
 # Local Variables:
 # mode: perl
 # indent-tabs-mode: nil
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "my $VERSION = '"
 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
 # time-stamp-time-zone: "UTC0"
diff --git a/configure.ac b/configure.ac
index ca81e07104f7823dea57a0d791c5283dfe0a28b0..362d7cd3e6bb6537655f9117ac7dcde29dd5ef73 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 ##
 ## Configure Nolimips: a MIPS emulator with unlimited registers.
 ##
-AC_PREREQ([2.59])
+AC_PREREQ([2.63])
 
 
 ## Project -----------------------------
diff --git a/src/parse/asm-parse.yy.gen.py b/src/parse/asm-parse.yy.gen.py
index 8294cb561c9c7e401ec59a915e3e6a0763db5b1f..fc14508a7508d26db0a8c1a17b8bb528f871e7fb 100755
--- a/src/parse/asm-parse.yy.gen.py
+++ b/src/parse/asm-parse.yy.gen.py
@@ -57,7 +57,7 @@ using namespace inst;
 
 %require "2.1a"
 %skeleton "lalr1.cc"
-%error-verbose
+%define parse.error simple
 %defines
 %debug