diff --git a/rust.changes b/rust.changes
index 4555948..42cabe8 100644
--- a/rust.changes
+++ b/rust.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Dec 16 03:52:06 UTC 2022 - William Brown <william.brown@suse.com>
+
+- Update to version 1.66.0 - for details see the rust1.66 package
+
 -------------------------------------------------------------------
 Fri Nov  4 00:07:43 UTC 2022 - William Brown <william.brown@suse.com>
 
diff --git a/rust.spec b/rust.spec
index 79c78fb..571caa5 100644
--- a/rust.spec
+++ b/rust.spec
@@ -17,15 +17,15 @@
 #
 
 
-%global version_suffix 1.65
-%global version_current 1.65.0
+%global version_suffix 1.66
+%global version_current 1.66.0
 
 %define obsolete_rust_versioned() \
+Obsoletes:      %{1}1.65%{?2:-%{2}} \
 Obsoletes:      %{1}1.64%{?2:-%{2}} \
 Obsoletes:      %{1}1.63%{?2:-%{2}} \
 Obsoletes:      %{1}1.62%{?2:-%{2}} \
-Obsoletes:      %{1}1.61%{?2:-%{2}} \
-Obsoletes:      %{1}1.60%{?2:-%{2}}
+Obsoletes:      %{1}1.61%{?2:-%{2}}
 
 # === rust arch support tiers ===
 # https://doc.rust-lang.org/nightly/rustc/platform-support.html