diff --git a/Sources/OpenAPIKit/Document/Document.swift b/Sources/OpenAPIKit/Document/Document.swift
index 0e302d4c9..8264509c0 100644
--- a/Sources/OpenAPIKit/Document/Document.swift
+++ b/Sources/OpenAPIKit/Document/Document.swift
@@ -217,12 +217,13 @@ extension OpenAPI.Document {
         }
     }
 
-    /// Retrieve an array of all locally defined Operation Ids defined by
-    /// this API. These Ids are guaranteed to be unique by
+    /// Retrieve an array of all Operation Ids defined by locally
+    /// by this API. These Ids are guaranteed to be unique by
     /// the OpenAPI Specification.
     ///
-    /// PathItems will be looked up in the components, but any remote references
-    /// or path items missing from the components will be ignored.
+    /// `PathItems` from `paths` and `webhooks` will be looked
+    /// up in the components, but any remote references or path items
+    /// missing from the components will be ignored.
     ///
     /// The ordering is not necessarily significant, but it will
     /// be the order in which each operation is occurred within
@@ -232,10 +233,10 @@ extension OpenAPI.Document {
     /// See [Operation Object](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#operation-object) in the specifcation.
     ///
     public var allOperationIds: [String] {
-        return paths.values
-            .compactMap { components[$0] }
-            .flatMap { $0.endpoints }
-            .compactMap { $0.operation.operationId }
+      return (paths.values + webhooks.values)
+        .compactMap { components[$0] }
+        .flatMap { $0.endpoints }
+        .compactMap { $0.operation.operationId }
     }
 
     /// All servers referenced anywhere in the whole document.
@@ -296,7 +297,7 @@ extension OpenAPI.Document {
             }
         }
 
-        for pathItem in paths.values {
+        for pathItem in (paths.values + webhooks.values) {
             let pathItemServers = components[pathItem]?.servers ?? []
             pathItemServers.forEach(insertUniquely)
 
@@ -317,7 +318,7 @@ extension OpenAPI.Document {
     public var allTags: Set<String> {
         return Set(
             (tags ?? []).map { $0.name }
-            + paths.values.compactMap { components[$0] }
+            + (paths.values + webhooks.values).compactMap { components[$0] }
                 .flatMap { $0.endpoints }
                 .flatMap { $0.operation.tags ?? [] }
         )
diff --git a/Tests/OpenAPIKitTests/Document/DocumentTests.swift b/Tests/OpenAPIKitTests/Document/DocumentTests.swift
index c68703e8d..4ae5f9070 100644
--- a/Tests/OpenAPIKitTests/Document/DocumentTests.swift
+++ b/Tests/OpenAPIKitTests/Document/DocumentTests.swift
@@ -79,6 +79,7 @@ final class DocumentTests: XCTestCase {
     }
 
     func test_getAllOperationIds() {
+        // paths, no operation ids, no components, no webhooks
         let t1 = OpenAPI.Document(
             info: .init(title: "test", version: "1.0"),
             servers: [],
@@ -93,6 +94,7 @@ final class DocumentTests: XCTestCase {
 
         XCTAssertEqual(t1.allOperationIds, [])
 
+        // paths, one operation id (second one nil), no components, no webhooks
         let t2 = OpenAPI.Document(
             info: .init(title: "test", version: "1.0"),
             servers: [],
@@ -107,6 +109,7 @@ final class DocumentTests: XCTestCase {
 
         XCTAssertEqual(t2.allOperationIds, ["test"])
 
+        // paths, multiple operation ids, no components, no webhooks
         let t3 = OpenAPI.Document(
             info: .init(title: "test", version: "1.0"),
             servers: [],
@@ -121,6 +124,7 @@ final class DocumentTests: XCTestCase {
 
         XCTAssertEqual(t3.allOperationIds, ["test", "two"])
 
+        // paths, one operation id (first one nil), no components, no webhooks
         let t4 = OpenAPI.Document(
             info: .init(title: "test", version: "1.0"),
             servers: [],
@@ -134,6 +138,36 @@ final class DocumentTests: XCTestCase {
         )
 
         XCTAssertEqual(t4.allOperationIds, ["two"])
+
+        // paths, one operation id, one component reference, no webhooks
+        let t5 = OpenAPI.Document(
+          info: .init(title: "test", version: "1.0"),
+          servers: [],
+          paths: [
+            "/hello": .init(
+              get: .init(operationId: "test", responses: [:])),
+            "/hello/world": .reference(.component(named: "hello-world"))
+          ],
+          components: .init(
+              pathItems: ["hello-world": .init(put: .init(operationId: "two", responses: [:]))]
+          )
+        )
+
+        XCTAssertEqual(t5.allOperationIds, ["test", "two"])
+
+        // no paths, one webhook with an operation id
+        let t6 = OpenAPI.Document(
+          info: .init(title: "test", version: "1.0"),
+          servers: [],
+          paths: [:],
+          webhooks: [
+            "/hello": .init(
+              get: .init(operationId: "test", responses: [:]))
+          ],
+          components: .noComponents
+        )
+
+        XCTAssertEqual(t6.allOperationIds, ["test"])
     }
 
     func test_allServersEmpty() {