diff --git a/scripts/build.cmd b/scripts/build.cmd
index 98f690e0..ef14aa30 100644
--- a/scripts/build.cmd
+++ b/scripts/build.cmd
@@ -3,17 +3,17 @@
 @SET GOOS=windows
 @SET GOARCH=amd64
 @SET FILENAME=go2rtc_win64.zip
-go build -ldflags "-s -w" -trimpath && 7z a -sdel %FILENAME% go2rtc.exe
+go build -ldflags "-s -w" -trimpath && 7z a -mx9 -sdel %FILENAME% go2rtc.exe
 
 @SET GOOS=windows
 @SET GOARCH=386
 @SET FILENAME=go2rtc_win32.zip
-go build -ldflags "-s -w" -trimpath && 7z a -sdel %FILENAME% go2rtc.exe
+go build -ldflags "-s -w" -trimpath && 7z a -mx9 -sdel %FILENAME% go2rtc.exe
 
 @SET GOOS=windows
 @SET GOARCH=arm64
 @SET FILENAME=go2rtc_win_arm64.zip
-go build -ldflags "-s -w" -trimpath && 7z a -sdel %FILENAME% go2rtc.exe
+go build -ldflags "-s -w" -trimpath && 7z a -mx9 -sdel %FILENAME% go2rtc.exe
 
 @SET GOOS=linux
 @SET GOARCH=amd64
@@ -44,9 +44,9 @@ go build -ldflags "-s -w" -trimpath -o %FILENAME% && upx %FILENAME%
 @SET GOOS=darwin
 @SET GOARCH=amd64
 @SET FILENAME=go2rtc_mac_amd64.zip
-go build -ldflags "-s -w" -trimpath && 7z a -sdel %FILENAME% go2rtc
+go build -ldflags "-s -w" -trimpath && 7z a -mx9 -sdel %FILENAME% go2rtc
 
 @SET GOOS=darwin
 @SET GOARCH=arm64
 @SET FILENAME=go2rtc_mac_arm64.zip
-go build -ldflags "-s -w" -trimpath && 7z a -sdel %FILENAME% go2rtc
+go build -ldflags "-s -w" -trimpath && 7z a -mx9 -sdel %FILENAME% go2rtc