diff --git a/pyproject.toml b/pyproject.toml
index 4cc44e1..32576d7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "validate-pyproject-schema-store"
-version = "2024.03.18"
+version = "2024.03.25"
 authors = [
   { name = "Henry Schreiner", email = "henryfs@princeton.edu" },
 ]
diff --git a/src/validate_pyproject_schema_store/resources/poetry.schema.json b/src/validate_pyproject_schema_store/resources/poetry.schema.json
index e7d4acc..fffe09f 100644
--- a/src/validate_pyproject_schema_store/resources/poetry.schema.json
+++ b/src/validate_pyproject_schema_store/resources/poetry.schema.json
@@ -2,6 +2,19 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "$id": "https://json.schemastore.org/partial-poetry.json",
   "definitions": {
+    "poetry-name": {
+      "type": "string",
+      "description": "Package name."
+    },
+    "poetry-version": {
+      "type": "string",
+      "description": "Version of the package. It should follow semantic versioning, but it is not enforced."
+    },
+    "poetry-description": {
+      "type": "string",
+      "description": "Short package description.",
+      "pattern": "^[^\n]*$"
+    },
     "poetry-author-pattern": {
       "description": "Pattern that matches `Name <email>` like 'King Arthur' or 'Miss Islington &lt;miss-islington@python.org&gt;'.",
       "type": "string",
@@ -431,25 +444,20 @@
   },
   "type": "object",
   "additionalProperties": true,
-  "required": [
-    "name",
-    "version",
-    "description",
-    "authors"
-  ],
   "properties": {
+    "package-mode": {
+      "type": "boolean",
+      "description": "Whether Poetry operates in package mode or not.",
+      "default": true
+    },
     "name": {
-      "type": "string",
-      "description": "Package name."
+      "$ref": "#/definitions/poetry-name"
     },
     "version": {
-      "type": "string",
-      "description": "Version of the package. It should follow semantic versioning, but it is not enforced."
+      "$ref": "#/definitions/poetry-version"
     },
     "description": {
-      "type": "string",
-      "description": "Short package description.",
-      "pattern": "^[^\n]*$"
+      "$ref": "#/definitions/poetry-description"
     },
     "keywords": {
       "type": "array",
@@ -667,5 +675,34 @@
         }
       }
     }
+  },
+  "if": {
+    "properties": {
+      "package-mode": {
+        "const": true
+      }
+    }
+  },
+  "then": {
+    "required": [
+      "name",
+      "version",
+      "description",
+      "authors"
+    ],
+    "properties": {
+      "name": {
+        "$ref": "#/definitions/poetry-name"
+      },
+      "version": {
+        "$ref": "#/definitions/poetry-version"
+      },
+      "description": {
+        "$ref": "#/definitions/poetry-description"
+      },
+      "authors": {
+        "$ref": "#/definitions/poetry-authors"
+      }
+    }
   }
 }