diff --git a/inst/schema/outpack/README.md b/inst/schema/outpack/README.md
index 852daa76..83ac244e 100644
--- a/inst/schema/outpack/README.md
+++ b/inst/schema/outpack/README.md
@@ -1,8 +1,8 @@
 # Imported from outpack
 
 * Schema version 0.1.1
-* Imported on 2023-08-17 10:00:21.068664
-* From outpack @ ba2bb5bf44a56b3c0ce78128fa419375df109fe3 (main)
+* Imported on 2024-07-10 10:46:08.587491
+* From outpack @ f521a290636c01c777d6550bca78e0a8e0f051f8 (main)
 
 Do not make changes to files here, they will be overwritten
 Run ./scripts/update_schemas to update
diff --git a/inst/schema/outpack/git.json b/inst/schema/outpack/git.json
index 5fe44ac2..9161b1fc 100644
--- a/inst/schema/outpack/git.json
+++ b/inst/schema/outpack/git.json
@@ -19,5 +19,6 @@
                 "type": "string"
             }
         }
-    }
+    },
+    "required": ["url", "sha", "branch"]
 }
diff --git a/inst/schema/outpack/metadata.json b/inst/schema/outpack/metadata.json
index 85fd1272..7488e413 100644
--- a/inst/schema/outpack/metadata.json
+++ b/inst/schema/outpack/metadata.json
@@ -60,7 +60,7 @@
                 "properties": {
                     "path": {
                         "description": "The path of the file",
-                        "type": "string"
+                        "$ref": "relative-path.json"
                     },
                     "hash": {
                         "$ref": "hash.json"
@@ -88,17 +88,16 @@
                     },
                     "files": {
                         "type": "array",
-                        "minItems": 1,
                         "items": {
                             "type": "object",
                             "properties": {
                                 "here": {
                                     "description": "The path of the file in this packet",
-                                    "type": "string"
+                                    "$ref": "relative-path.json"
                                 },
                                 "there": {
                                     "description": "The path of the file within the upstream packet",
-                                    "type": "string"
+                                    "$ref": "relative-path.json"
                                 }
                             },
                             "required": ["here", "there"]
diff --git a/inst/schema/outpack/relative-path.json b/inst/schema/outpack/relative-path.json
new file mode 100644
index 00000000..1c27adee
--- /dev/null
+++ b/inst/schema/outpack/relative-path.json
@@ -0,0 +1,9 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "title": "File path",
+    "description": "A relative cross-platform file path",
+    "version": "0.1.1",
+
+    "type": "string",
+    "pattern": "^([^<>:\"/\\\\|?*\\x00-\\x1f]+/)*[^<>:\"/\\\\|?*\\x00-\\x1f]+$"
+}