diff --git a/libcbor.changes b/libcbor.changes
index f5041dc..2433910 100644
--- a/libcbor.changes
+++ b/libcbor.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Jan 21 00:44:42 UTC 2025 - Steve Kowalik <steven.kowalik@suse.com>
+
+- Explicitly BuildRequire sphinx_rtd_theme. 
+
 -------------------------------------------------------------------
 Mon Sep 16 09:29:46 UTC 2024 - Eric Schirra <ecsos@opensuse.org>
 
diff --git a/libcbor.spec b/libcbor.spec
index 32b4147..8742459 100644
--- a/libcbor.spec
+++ b/libcbor.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libcbor
 #
-# Copyright (c) 2024 SUSE LLC
+# Copyright (c) 2025 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -50,6 +50,7 @@ Source1:        libcbor.3
 BuildRequires:  doxygen
 BuildRequires:  python3-Sphinx
 BuildRequires:  python3-breathe
+BuildRequires:  python3-sphinx_rtd_theme
 %else
 BuildRequires:  cmake
 BuildRequires:  gcc-c++