diff --git a/kdiff3.spec b/kdiff3.spec
index 9cc8b04..f254a8d 100644
--- a/kdiff3.spec
+++ b/kdiff3.spec
@@ -31,7 +31,7 @@ Source0:        https://download.kde.org/stable/%{name}/%{name}-%{version}.tar.x
 Source1:        https://download.kde.org/stable/%{name}/%{name}-%{version}.tar.xz.sig
 Source2:        kdiff3.keyring
 %endif
-BuildRequires:  boost-devel >= 1.80.0
+BuildRequires:  boost-devel >= 1.71
 BuildRequires:  kf6-extra-cmake-modules >= %{kf6_version}
 BuildRequires:  fdupes
 BuildRequires:  update-desktop-files