diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index e1cf0e3..cc2ba2f 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Oct  3 10:08:03 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- build using rust 1.63
+
 -------------------------------------------------------------------
 Wed Sep 28 08:13:07 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index bba62a6..63c8d84 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -100,8 +100,8 @@ BuildRequires:  rust >= 1.59
 # minimal requirement:
 BuildRequires:  rust+cargo >= 1.59
 # actually used upstream:
-BuildRequires:  cargo1.60
-BuildRequires:  rust1.60
+BuildRequires:  cargo1.63
+BuildRequires:  rust1.63
 %endif
 %if 0%{useccache} != 0
 BuildRequires:  ccache