diff --git a/.gitignore b/.gitignore
index 69b30c7..7493d2d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,9 @@ dist/
 *.lock
 .fvtt-*/
 
+# LevelDB lock files — created at runtime, must not be shipped in the zip
+**/LOCK
+
 # Compiled / minified outputs (keep source only)
 *.min.js
 *.min.css
diff --git a/packs/sla-armors/LOCK b/packs/sla-armors/LOCK
deleted file mode 100644
index e69de29..0000000
diff --git a/packs/sla-drugs/LOCK b/packs/sla-drugs/LOCK
deleted file mode 100644
index e69de29..0000000
diff --git a/packs/sla-ebb-formulae/LOCK b/packs/sla-ebb-formulae/LOCK
deleted file mode 100644
index e69de29..0000000
diff --git a/packs/sla-specialties/LOCK b/packs/sla-specialties/LOCK
deleted file mode 100644
index e69de29..0000000
diff --git a/system.json b/system.json
index d642db1..e1ed3a9 100644
--- a/system.json
+++ b/system.json
@@ -2,7 +2,7 @@
   "id": "zero-engine",
   "title": "Zero Engine (SLA Industries)",
   "description": "A basic game system for SLA Industries using the Zero Engine rules.",
-  "version": "1.3.0-dev",
+  "version": "1.3.1",
   "compatibility": {
     "minimum": 13,
     "verified": "14.359"