diff --git a/.gitignore b/.gitignore
index ea5e986..b4b303e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 /ipv6calc-3.1.1.tar.gz
 /ipv6calc-3.2.0.tar.gz
 /ipv6calc-4.0.0.tar.gz
+/ipv6calc-4.0.1.tar.gz
diff --git a/ipv6calc.spec b/ipv6calc.spec
index 24e3a7a..fea3d5e 100644
--- a/ipv6calc.spec
+++ b/ipv6calc.spec
@@ -15,8 +15,8 @@
 
 Summary:	IPv6 address format change and calculation utility
 Name:		ipv6calc
-Version:	4.0.0
-Release:	62%{?gittag}%{?dist}
+Version:	4.0.1
+Release:	63%{?gittag}%{?dist}
 URL:		http://www.deepspace6.net/projects/%{name}.html
 License:	GPLv2
 %if 0%{?gitcommit:1}
@@ -349,6 +349,9 @@ fi
 
 
 %changelog
+* Thu Jan 27 2022 Peter Bieringer <pb@bieringer.de> - 4.0.1-63
+- Final release 4.0.1
+
 * Mon Nov  1 2021 Peter Bieringer <pb@bieringer.de> - 4.0.0-62
 - Update to latest fixed release
 
diff --git a/sources b/sources
index 5c033a1..f7c5c54 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (ipv6calc-4.0.0.tar.gz) = 939dfcbe68c6e110acfe23f6f221471bda03ad165f5785bbc9aabd03b3192ab3cdb99df458db79edfa3c3d2f3202f1f2f189b7a9fd9a5ae27a7084de2fbd907d
+SHA512 (ipv6calc-4.0.1.tar.gz) = 6e60f4808b2622235ea9c43c99868798e7014fbee7dc51349cfe2ba28badcc767d45f9e30dc14d3b78c4a88ef2ff80083b4b0be64e93ed17b17817995364b3ce