diff -ru galois-0.7-orig/configure galois-0.7/configure
--- galois-0.7-orig/configure	2020-09-16 21:16:06.245182646 +0200
+++ galois-0.7/configure	2020-09-16 21:37:46.142606075 +0200
@@ -2495,12 +2495,12 @@
     pkg_cv_libxmlplusplus_CFLAGS="$libxmlplusplus_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libxml++-2.6\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libxml++-2.6") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libxml++-3.0\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libxml++-3.0") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_libxmlplusplus_CFLAGS=`$PKG_CONFIG --cflags "libxml++-2.6" 2>/dev/null`
+  pkg_cv_libxmlplusplus_CFLAGS=`$PKG_CONFIG --cflags "libxml++-3.0" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -2512,12 +2512,12 @@
     pkg_cv_libxmlplusplus_LIBS="$libxmlplusplus_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libxml++-2.6\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libxml++-2.6") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libxml++-3.0\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libxml++-3.0") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_libxmlplusplus_LIBS=`$PKG_CONFIG --libs "libxml++-2.6" 2>/dev/null`
+  pkg_cv_libxmlplusplus_LIBS=`$PKG_CONFIG --libs "libxml++-3.0" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -2538,14 +2538,14 @@
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        libxmlplusplus_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libxml++-2.6" 2>&1`
+	        libxmlplusplus_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libxml++-3.0" 2>&1`
         else
-	        libxmlplusplus_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libxml++-2.6" 2>&1`
+	        libxmlplusplus_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libxml++-3.0" 2>&1`
         fi
 	# Put the nasty error message in config.log where it belongs
 	echo "$libxmlplusplus_PKG_ERRORS" >&5
 
-	as_fn_error $? "Package requirements (libxml++-2.6) were not met:
+	as_fn_error $? "Package requirements (libxml++-3.0) were not met:
 
 $libxmlplusplus_PKG_ERRORS
 
diff -ru galois-0.7-orig/configure.ac galois-0.7/configure.ac
--- galois-0.7-orig/configure.ac	2020-09-16 21:16:06.245182646 +0200
+++ galois-0.7/configure.ac	2020-09-16 21:37:38.982854339 +0200
@@ -21,5 +21,5 @@
 AC_CONFIG_FILES([misc/galois.desktop])
 AC_PROG_CXX
 PKG_CHECK_MODULES([gtkmm], [gtkmm-3.0])
-PKG_CHECK_MODULES([libxmlplusplus], [libxml++-2.6])
+PKG_CHECK_MODULES([libxmlplusplus], [libxml++-3.0])
 AC_OUTPUT
diff -ru galois-0.7-orig/src/makefile.in galois-0.7/src/makefile.in
--- galois-0.7-orig/src/makefile.in	2020-09-16 21:16:06.251845979 +0200
+++ galois-0.7/src/makefile.in	2020-09-16 21:37:27.661850909 +0200
@@ -23,8 +23,8 @@
 PKG_CONFIG = @PKG_CONFIG@
 GTKMM_CFLAGS = `${PKG_CONFIG} --cflags gtkmm-3.0`
 GTKMM_LIBS = `${PKG_CONFIG} --libs gtkmm-3.0`
-XMLPP_CFLAGS = `${PKG_CONFIG} --cflags libxml++-2.6`
-XMLPP_LIBS = `${PKG_CONFIG} --libs libxml++-2.6`
+XMLPP_CFLAGS = `${PKG_CONFIG} --cflags libxml++-3.0`
+XMLPP_LIBS = `${PKG_CONFIG} --libs libxml++-3.0`
 THREAD_LIBS = -pthread
 
 EXE = galois
diff -ru galois-0.7-orig/src/preferences.cc galois-0.7/src/preferences.cc
--- galois-0.7-orig/src/preferences.cc	2020-09-16 21:16:06.245182646 +0200
+++ galois-0.7/src/preferences.cc	2020-09-16 21:37:58.976186194 +0200
@@ -385,12 +385,12 @@
       reader->read();
       // skip whitespace and comments
       while (reader->get_node_type() ==
-	     xmlpp::TextReader::SignificantWhitespace ||
-	     reader->get_node_type() == xmlpp::TextReader::Comment)
+	     xmlpp::TextReader::NodeType::SignificantWhitespace ||
+	     reader->get_node_type() == xmlpp::TextReader::NodeType::Comment)
 	reader->read();
 
       // document node
-      if (reader->get_node_type() != xmlpp::TextReader::Element ||
+      if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element ||
 	  reader->get_name() != "galois_config")
 	return false;
 
@@ -400,16 +400,16 @@
 	  reader->read();
 	  // skip whitespace and comments
 	  while (reader->get_node_type() ==
-		 xmlpp::TextReader::SignificantWhitespace ||
-		 reader->get_node_type() == xmlpp::TextReader::Comment)
+		 xmlpp::TextReader::NodeType::SignificantWhitespace ||
+		 reader->get_node_type() == xmlpp::TextReader::NodeType::Comment)
 	    reader->read();
 
 	  // end of document node
-	  if (reader->get_node_type() == xmlpp::TextReader::EndElement
+	  if (reader->get_node_type() == xmlpp::TextReader::NodeType::EndElement
 	      && reader->get_name() == "galois_config")
 	    break;
 
-	  if (reader->get_node_type() != xmlpp::TextReader::Element)
+	  if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element)
 	    return false;
 
 	  // read and apply properties
@@ -422,17 +422,17 @@
 		  reader->read();
 		  // skip whitespace and comments
 		  while (reader->get_node_type() ==
-			 xmlpp::TextReader::SignificantWhitespace ||
+			 xmlpp::TextReader::NodeType::SignificantWhitespace ||
 			 reader->get_node_type() ==
-			 xmlpp::TextReader::Comment)
+			 xmlpp::TextReader::NodeType::Comment)
 		    reader->read();
 
 		  // end of document node
-		  if (reader->get_node_type() == xmlpp::TextReader::EndElement
+		  if (reader->get_node_type() == xmlpp::TextReader::NodeType::EndElement
 		      && reader->get_name() == "keys_2d")
 		    break;
 
-		  if (reader->get_node_type() != xmlpp::TextReader::Element ||
+		  if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element ||
 		      reader->get_name() != "control_key")
 		    return false;
 
@@ -458,17 +458,17 @@
 		  reader->read();
 		  // skip whitespace and comments
 		  while (reader->get_node_type() ==
-			 xmlpp::TextReader::SignificantWhitespace ||
+			 xmlpp::TextReader::NodeType::SignificantWhitespace ||
 			 reader->get_node_type() ==
-			 xmlpp::TextReader::Comment)
+			 xmlpp::TextReader::NodeType::Comment)
 		    reader->read();
 
 		  // end of document node
-		  if (reader->get_node_type() == xmlpp::TextReader::EndElement
+		  if (reader->get_node_type() == xmlpp::TextReader::NodeType::EndElement
 		      && reader->get_name() == "keys_3d")
 		    break;
 
-		  if (reader->get_node_type() != xmlpp::TextReader::Element ||
+		  if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element ||
 		      reader->get_name() != "control_key")
 		    return false;
 
diff -ru galois-0.7-orig/src/scores.cc galois-0.7/src/scores.cc
--- galois-0.7-orig/src/scores.cc	2020-09-16 21:16:06.251845979 +0200
+++ galois-0.7/src/scores.cc	2020-09-16 21:37:58.976186194 +0200
@@ -420,12 +420,12 @@
       reader->read();
       // skip whitespace and comments
       while (reader->get_node_type() ==
-	     xmlpp::TextReader::SignificantWhitespace ||
-	     reader->get_node_type() == xmlpp::TextReader::Comment)
+	     xmlpp::TextReader::NodeType::SignificantWhitespace ||
+	     reader->get_node_type() == xmlpp::TextReader::NodeType::Comment)
 	reader->read();
 
       // document node
-      if (reader->get_node_type() != xmlpp::TextReader::Element ||
+      if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element ||
 	  reader->get_name() != "galois_scores")
 	return false;
 
@@ -436,16 +436,16 @@
 	  reader->read();
 	  // skip whitespace and comments
 	  while (reader->get_node_type() ==
-		 xmlpp::TextReader::SignificantWhitespace ||
-		 reader->get_node_type() == xmlpp::TextReader::Comment)
+		 xmlpp::TextReader::NodeType::SignificantWhitespace ||
+		 reader->get_node_type() == xmlpp::TextReader::NodeType::Comment)
 	    reader->read();
 
 	  // end of document node
-	  if (reader->get_node_type() == xmlpp::TextReader::EndElement
+	  if (reader->get_node_type() == xmlpp::TextReader::NodeType::EndElement
 	      && reader->get_name() == "galois_scores")
 	    break;
 
-	  if (reader->get_node_type() != xmlpp::TextReader::Element ||
+	  if (reader->get_node_type() != xmlpp::TextReader::NodeType::Element ||
 	      reader->get_name() != "game")
 	    return false;