diff --git a/scripts/release/freebsd_aarch64/p2pool_freebsd_aarch64.sh b/scripts/release/freebsd_aarch64/p2pool_freebsd_aarch64.sh
index f4ebe56..48a3f4e 100755
--- a/scripts/release/freebsd_aarch64/p2pool_freebsd_aarch64.sh
+++ b/scripts/release/freebsd_aarch64/p2pool_freebsd_aarch64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/freebsd_x64/p2pool_freebsd_x64.sh b/scripts/release/freebsd_x64/p2pool_freebsd_x64.sh
index bed1852..7990fab 100755
--- a/scripts/release/freebsd_x64/p2pool_freebsd_x64.sh
+++ b/scripts/release/freebsd_x64/p2pool_freebsd_x64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/linux_aarch64/p2pool_linux_aarch64.sh b/scripts/release/linux_aarch64/p2pool_linux_aarch64.sh
index 1abc060..56f7ce6 100755
--- a/scripts/release/linux_aarch64/p2pool_linux_aarch64.sh
+++ b/scripts/release/linux_aarch64/p2pool_linux_aarch64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/linux_riscv64/p2pool_linux_riscv64.sh b/scripts/release/linux_riscv64/p2pool_linux_riscv64.sh
index 6b70c48..dbc4e5c 100755
--- a/scripts/release/linux_riscv64/p2pool_linux_riscv64.sh
+++ b/scripts/release/linux_riscv64/p2pool_linux_riscv64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/linux_x64/p2pool_linux_x64.sh b/scripts/release/linux_x64/p2pool_linux_x64.sh
index 7a9fa37..7e5c89d 100755
--- a/scripts/release/linux_x64/p2pool_linux_x64.sh
+++ b/scripts/release/linux_x64/p2pool_linux_x64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/macos_aarch64/p2pool_macos_aarch64.sh b/scripts/release/macos_aarch64/p2pool_macos_aarch64.sh
index f733ed4..daf39e3 100755
--- a/scripts/release/macos_aarch64/p2pool_macos_aarch64.sh
+++ b/scripts/release/macos_aarch64/p2pool_macos_aarch64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/macos_x64/p2pool_macos_x64.sh b/scripts/release/macos_x64/p2pool_macos_x64.sh
index dc75dfc..e969807 100755
--- a/scripts/release/macos_x64/p2pool_macos_x64.sh
+++ b/scripts/release/macos_x64/p2pool_macos_x64.sh
@@ -52,4 +52,4 @@ chmod 0775 $1/p2pool
 
 tar cvf $1.tar --format=pax --pax-option='exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime' --sort=name --owner=0 --group=0 --mtime="$CURRENT_DATE $CURRENT_TIME" $1
 touch -t $TOUCH_DATE $1.tar
-7z a -tgzip -mx9 -mfb256 -stl $1.tar.gz $1.tar
+7z a -tgzip -mx9 -mfb256 -mpass15 -stl $1.tar.gz $1.tar
diff --git a/scripts/release/windows_x64/p2pool_windows_x64.sh b/scripts/release/windows_x64/p2pool_windows_x64.sh
index 074ef64..b93f5cc 100755
--- a/scripts/release/windows_x64/p2pool_windows_x64.sh
+++ b/scripts/release/windows_x64/p2pool_windows_x64.sh
@@ -57,4 +57,4 @@ chmod 0775 $1/p2pool.exe
 
 touch -t $TOUCH_DATE $1
 touch -t $TOUCH_DATE $1/*
-7z a -tzip -mx9 -mfb256 -stl $1.zip $1
+7z a -tzip -mx9 -mfb256 -mpass15 -stl $1.zip $1