diff --git a/src/Makefile.am b/src/Makefile.am
index c70c4114a09e586417c4c57f2b134f54b50e9657..8c53109f832ba8b81b408ea0d9ae398442bdc350 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -170,8 +170,8 @@ libyaxt_la_SOURCES =						\
 	yaxt.f90
 
 libyaxt_la_LIBADD = libyaxt_c.la $(MPI_FC_LIB)
-libyaxt_la_LDFLAGS = -version-info 4:0:3
-libyaxt_c_la_LDFLAGS = -version-info 4:0:3
+libyaxt_la_LDFLAGS = -version-info 5:0:4
+libyaxt_c_la_LDFLAGS = -version-info 5:0:4
 
 EXTRA_DIST = m4-templates/xt_redist_template_module.f90.m4 \
 	m4-templates/f03-redist-gen.m4 \