diff --git a/.github/workflows/validate.yaml b/.github/workflows/validate.yaml
index 7ccf632..466d143 100644
--- a/.github/workflows/validate.yaml
+++ b/.github/workflows/validate.yaml
@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v3
         with:
           python-version: 3.11
 
@@ -23,4 +23,22 @@ jobs:
         run: pip install -r utility/requirements.txt
 
       - name: Validate repository lists
-        run: ./utility/validate.py $(find **/*.json -not -name 'other.json')
+        run: ./utility/validate.py --verbose $(find . -name '*.json' -not -name 'other.json' -not -name 'schema*.json')
+
+  validate_other_lists:
+    name: Validate other lists
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.11
+
+      - name: Install dependencies
+        run: pip install -r utility/requirements.txt
+
+      - name: Validate repository lists
+        run: ./utility/validate.py --verbose --other $(find . -name 'other.json')
diff --git a/alan_turing_institute/other.json b/alan_turing_institute/other.json
index 680a4e4..1282af0 100644
--- a/alan_turing_institute/other.json
+++ b/alan_turing_institute/other.json
@@ -2,7 +2,7 @@
   {
     "package_name": "RStudio",
     "url": "https://posit.co/download/rstudio-desktop/",
-    "version": "*",
+    "version": "> 0",
     "approval_date": "2023-09-29",
     "revoke_date": null
   }
diff --git a/schema.json b/schema.json
new file mode 100644
index 0000000..5439703
--- /dev/null
+++ b/schema.json
@@ -0,0 +1,34 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "type": "array",
+    "minItems": 1,
+    "uniqueItems": true,
+    "items": {
+        "type": "object",
+        "properties": {
+            "package_name": {"type": "string"},
+            "version": {
+                "type": "string",
+                "_comment": "PEP404 version string prefixed with a comparison operator, Excluding trailing '.*'.\nhttps://peps.python.org/pep-0440/#version-specifiers\nhttps://peps.python.org/pep-0440/#appendix-b-parsing-version-strings-with-regular-expressions",
+                "pattern": "^(~=|==|!=|<=|>=|<|>|===)\\s*([1-9][0-9]*!)?(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*))*((a|b|rc)(0|[1-9][0-9]*))?(\\.post(0|[1-9][0-9]*))?(\\.dev(0|[1-9][0-9]*))?$"
+            },
+            "approval_date": {
+                "type": "string",
+                "format": "date"
+            },
+            "revoke_date": {
+                "oneOf": [
+                    {
+                        "type": "string",
+                        "format": "date"
+                    },
+                    {
+                        "type": "null"
+                    }
+                ]
+            }
+        },
+        "required": ["package_name", "version", "approval_date", "revoke_date"],
+        "additionalProperties": false
+    }
+}
diff --git a/schema_other.json b/schema_other.json
new file mode 100644
index 0000000..6a7e5ad
--- /dev/null
+++ b/schema_other.json
@@ -0,0 +1,38 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "type": "array",
+    "minItems": 1,
+    "uniqueItems": true,
+    "items": {
+        "type": "object",
+        "properties": {
+            "package_name": {"type": "string"},
+            "url": {
+                "type": "string",
+                "format": "uri"
+            },
+            "version": {
+                "type": "string",
+                "_comment": "PEP404 version string prefixed with a comparison operator, Excluding trailing '.*'.\nhttps://peps.python.org/pep-0440/#version-specifiers\nhttps://peps.python.org/pep-0440/#appendix-b-parsing-version-strings-with-regular-expressions",
+                "pattern": "^(~=|==|!=|<=|>=|<|>|===)\\s*([1-9][0-9]*!)?(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*))*((a|b|rc)(0|[1-9][0-9]*))?(\\.post(0|[1-9][0-9]*))?(\\.dev(0|[1-9][0-9]*))?$"
+            },
+            "approval_date": {
+                "type": "string",
+                "format": "date"
+            },
+            "revoke_date": {
+                "oneOf": [
+                    {
+                        "type": "string",
+                        "format": "date"
+                    },
+                    {
+                        "type": "null"
+                    }
+                ]
+            }
+        },
+        "required": ["package_name", "url", "version", "approval_date", "revoke_date"],
+        "additionalProperties": false
+    }
+}
diff --git a/utility/requirements.in b/utility/requirements.in
index d89304b..049fc28 100644
--- a/utility/requirements.in
+++ b/utility/requirements.in
@@ -1 +1 @@
-jsonschema
+jsonschema[format]
diff --git a/utility/requirements.txt b/utility/requirements.txt
index e7bc41d..6174807 100644
--- a/utility/requirements.txt
+++ b/utility/requirements.txt
@@ -4,19 +4,43 @@
 #
 #    pip-compile requirements.in
 #
+arrow==1.2.3
+    # via isoduration
 attrs==23.1.0
     # via
     #   jsonschema
     #   referencing
-jsonschema==4.19.1
+fqdn==1.5.1
+    # via jsonschema
+idna==3.4
+    # via jsonschema
+isoduration==20.11.0
+    # via jsonschema
+jsonpointer==2.4
+    # via jsonschema
+jsonschema[format]==4.19.1
     # via -r requirements.in
 jsonschema-specifications==2023.7.1
     # via jsonschema
+python-dateutil==2.8.2
+    # via arrow
 referencing==0.30.2
     # via
     #   jsonschema
     #   jsonschema-specifications
+rfc3339-validator==0.1.4
+    # via jsonschema
+rfc3987==1.3.8
+    # via jsonschema
 rpds-py==0.10.3
     # via
     #   jsonschema
     #   referencing
+six==1.16.0
+    # via
+    #   python-dateutil
+    #   rfc3339-validator
+uri-template==1.3.0
+    # via jsonschema
+webcolors==1.13
+    # via jsonschema
diff --git a/utility/validate.py b/utility/validate.py
index 2147aa6..3cf731c 100755
--- a/utility/validate.py
+++ b/utility/validate.py
@@ -2,47 +2,11 @@
 
 import argparse
 import json
-import pathlib
+from pathlib import Path
 
 import jsonschema
 
 
-schema = {
-    "type": "array",
-    "minItems": 1,
-    "uniqueItems": True,
-    "items": {
-        "type": "object",
-        "properties": {
-            "package_name": {"type": "string"},
-            "version": {
-                "type": "string",
-                # PEP404 version string prefixed with a comparison operator
-                # Excluding trailing '.*'
-                # https://peps.python.org/pep-0440/#version-specifiers
-                # https://peps.python.org/pep-0440/#appendix-b-parsing-version-strings-with-regular-expressions
-                "pattern": r'^(~=|==|!=|<=|>=|<|>|===)\s*([1-9][0-9]*!)?(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))*((a|b|rc)(0|[1-9][0-9]*))?(\.post(0|[1-9][0-9]*))?(\.dev(0|[1-9][0-9]*))?$'
-            },
-            "approval_date": {
-                "type": "string",
-                "format": "date"
-            },
-            "revoke_date": {
-                "oneOf": [
-                    {
-                        "type": "string",
-                        "format": "date"
-                    },
-                    {
-                        "type": "null"
-                    }
-                ]
-            }
-        }
-    }
-}
-
-
 class ValidationError(Exception):
     pass
 
@@ -54,13 +18,34 @@ def main() -> None:
     )
     parser.add_argument(
         "filename",
-        type=pathlib.Path,
+        type=Path,
         nargs="+",
     )
+    parser.add_argument(
+        "-o",
+        "--other",
+        action="store_true"
+    )
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="store_true"
+    )
 
     clargs = parser.parse_args()
 
+    if clargs.other:
+        schema_filename = "schema_other.json"
+    else:
+        schema_filename = "schema.json"
+
+    schema_path = Path(__file__).parent.parent.absolute() / schema_filename
+    with open(schema_path, "r") as file:
+        schema = json.load(file)
+
     for path in clargs.filename:
+        if clargs.verbose:
+            print(f"Validating {path}")
         with open(path, "r") as file:
             try:
                 jsonschema.validate(