--- a/configure.ac	2020-07-04 20:32:36.223805943 +0700
+++ b/configure.ac	2020-07-04 20:33:01.432033914 +0700
@@ -338,7 +338,7 @@
 else
         AC_MSG_RESULT(no)
 	AC_MSG_CHECKING(if libvala is available)
-	m4_foreach([VERSION], [[0.44], [0.42], [0.40], [0.38], [0.36], [0.34], [0.32], [0.30], [0.28], [0.26], [0.24], [0.22], [0.20], [0.18]],
+	m4_foreach([VERSION], [[0.56], [0.54], [0.52], [0.50], [0.48], [0.46], [0.44], [0.42], [0.40], [0.38], [0.36], [0.34], [0.32], [0.30], [0.28], [0.26], [0.24], [0.22], [0.20], [0.18]],
 		[PKG_CHECK_EXISTS([ libvala-VERSION ],
 			 [ valaver="-VERSION" ])
 			 ])