--- apertium-eo-es-0.9.0.orig/configure.ac
+++ apertium-eo-es-0.9.0/configure.ac
@@ -4,7 +4,7 @@
 
 AC_PREREQ(2.52)
 
-m4_define([required_apertium_version], [3.0.0])
+m4_define([required_apertium_version], [3.1.0])
 
 AC_INIT([apertium-eo-es], [0.9.0], [sortiz@users.sourceforge.net])
 AM_INIT_AUTOMAKE([apertium-eo-es], [0.9.0], no-define)
@@ -14,6 +14,6 @@
 
 
 PKG_CHECK_MODULES(apertium, [dnl
-  apertium-3.0 >= required_apertium_version])
+  apertium-3.1 >= required_apertium_version])
 
 AC_OUTPUT([Makefile])