diff --git a/configure.ac b/configure.ac
index 374f221..ce9f4c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,11 +4,11 @@ AC_INIT([apertium-srd], [1.4.0], [apertium-stuff@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 AC_PROG_AWK
 
-PKG_CHECK_MODULES(APERTIUM, apertium >= 3.7.1)
-PKG_CHECK_MODULES(LTTOOLBOX, lttoolbox >= 3.5.3)
-PKG_CHECK_MODULES(CG3, cg3 >= 1.3.2)
+PKG_CHECK_MODULES(APERTIUM, apertium >= 3.8.3)
+PKG_CHECK_MODULES(LTTOOLBOX, lttoolbox >= 3.7.1)
+PKG_CHECK_MODULES(CG3, cg3 >= 1.3.9)
 
-PKG_CHECK_MODULES(REGTEST, apertium-regtest >= 0.0.1, [],
+PKG_CHECK_MODULES(REGTEST, apertium-regtest >= 0.9.1, [],
                   [AC_MSG_WARN([Running tests requires apertium-regtest])])
 
 AP_MKINCLUDE