diff --git a/phd2.spec b/phd2.spec
index d77cb0c..b7cdc4f 100644
--- a/phd2.spec
+++ b/phd2.spec
@@ -1,6 +1,6 @@
 Name:           phd2
 Version:        2.6.4
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Telescope guiding software
 # Main program files are BSD licensed
 # Some components have different licenses:
@@ -116,6 +116,9 @@ fi
 
 
 %changelog
+* Fri Feb 23 2018 Christian Dersch <lupinix@mailbox.org> - 2.6.4-6
+- rebuilt for cfitsio 3.420 (so version bump)
+
 * Tue Feb 13 2018 Mattia Verga <mattia.verga@email.it> - 2.6.4-5
 - Enable test output on failures