diff --git a/keepass.spec b/keepass.spec
index f072be4..cab67f2 100644
--- a/keepass.spec
+++ b/keepass.spec
@@ -1,6 +1,6 @@
 Name:           keepass
 Version:        2.41
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Password manager
 
 License:        GPLv2+
@@ -53,12 +53,11 @@ find -name \*.png -print0 | xargs -0 mogrify -define png:format=png32
 %build
 ( cd Build && sh PrepMonoDev.sh )
 find . -name "*.sln" -print -exec sed -i 's/Format Version 10.00/Format Version 11.00/g' {} \;
-find . -name "*.csproj" -print -exec sed -i 's#ToolsVersion="3.5"#ToolsVersion="4.0"#g; s#<TargetFrameworkVersion>.*</TargetFrameworkVersion>##g; s#<PropertyGroup>#<PropertyGroup><TargetFrameworkVersion>v4.5</TargetFrameworkVersion>#g' {} \;
-xbuild /target:KeePass /property:Configuration=Release
+xbuild /target:KeePass /property:TargetFrameworkVersion=v4.7.1 /property:Configuration=Release
 for subdir in Images_App_HighRes Images_Client_16 Images_Client_HighRes; do
     xvfb-run -a mono Build/KeePass/Release/KeePass.exe -d:`pwd`/Ext/$subdir --makexspfile `pwd`/KeePass/Resources/Data/$subdir.bin
 done
-xbuild /target:KeePass /property:Configuration=Release
+xbuild /target:KeePass /property:TargetFrameworkVersion=v4.7.1 /property:Configuration=Release
 
 
 %install
@@ -107,6 +106,9 @@ appstream-util validate-relax --nonet %{buildroot}/%{_datadir}/appdata/*.appdata
 
 
 %changelog
+* Mon Apr 29 2019 Peter Oliver <rpm@mavit.org.uk> - 2.41-3
+- Build against against framework version 4.7.1 for Mono 5.18.  Fixes #1680388.
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.41-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild