diff --git a/resources/nsis/NSIS.template.in b/resources/nsis/NSIS.template.in
index f2c6ae730..93cb72ee7 100644
--- a/resources/nsis/NSIS.template.in
+++ b/resources/nsis/NSIS.template.in
@@ -138,6 +138,9 @@ NotInstalled:
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}" "InstallLocation" "$INSTDIR"
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}" "UninstallString" "$\"$INSTDIR\Uninstall.exe$\""
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}" "QuietUninstallString" "$\"$INSTDIR\Uninstall.exe$\" /S"
+
+  ; Open documentation.
+  ExecShell "open" "https://rssguard.readthedocs.io/en/stable/downloads.html#windows"
 SectionEnd
 
 Section "Desktop Icon" DesktopIcon