diff --git a/dev/src/field-value.ts b/dev/src/field-value.ts
index 1d793300c..c0947334d 100644
--- a/dev/src/field-value.ts
+++ b/dev/src/field-value.ts
@@ -102,7 +102,7 @@ export class FieldValue {
    *   // doc.get('array') contains field 'foo'
    * });
    */
-  static arrayUnion(...elements: Array<unknown>): FieldValue {
+  static arrayUnion(...elements: unknown[]): FieldValue {
     validateMinNumberOfArguments('FieldValue.arrayUnion', arguments, 1);
     return new ArrayUnionTransform(elements);
   }
@@ -129,7 +129,7 @@ export class FieldValue {
    *   // doc.get('array') no longer contains field 'foo'
    * });
    */
-  static arrayRemove(...elements: Array<unknown>): FieldValue {
+  static arrayRemove(...elements: unknown[]): FieldValue {
     validateMinNumberOfArguments('FieldValue.arrayRemove', arguments, 1);
     return new ArrayRemoveTransform(elements);
   }
@@ -282,7 +282,7 @@ class ServerTimestampTransform extends FieldTransform {
  * @private
  */
 class ArrayUnionTransform extends FieldTransform {
-  constructor(private readonly elements: Array<unknown>) {
+  constructor(private readonly elements: unknown[]) {
     super();
   }
 
@@ -335,7 +335,7 @@ class ArrayUnionTransform extends FieldTransform {
  * @private
  */
 class ArrayRemoveTransform extends FieldTransform {
-  constructor(private readonly elements: Array<unknown>) {
+  constructor(private readonly elements: unknown[]) {
     super();
   }
 
diff --git a/dev/src/reference.ts b/dev/src/reference.ts
index a481737c2..3b25a9015 100644
--- a/dev/src/reference.ts
+++ b/dev/src/reference.ts
@@ -926,7 +926,7 @@ export class Query {
    */
   static _extractFieldValues(
       documentSnapshot: DocumentSnapshot, fieldOrders: FieldOrder[]) {
-    const fieldValues: Array<unknown> = [];
+    const fieldValues: unknown[] = [];
 
     for (const fieldOrder of fieldOrders) {
       if (FieldPath.documentId().isEqual(fieldOrder.field)) {
diff --git a/dev/src/serializer.ts b/dev/src/serializer.ts
index 41e685fab..649ffd334 100644
--- a/dev/src/serializer.ts
+++ b/dev/src/serializer.ts
@@ -228,7 +228,7 @@ export class Serializer {
         return this.createReference(resourcePath.relativeName);
       }
       case 'arrayValue': {
-        const array: Array<unknown> = [];
+        const array: unknown[] = [];
         if (Array.isArray(proto.arrayValue!.values)) {
           for (const value of proto.arrayValue!.values!) {
             array.push(this.decodeValue(value));
@@ -312,7 +312,7 @@ export function validateUserInput(
   const fieldPathMessage = path ? ` (found in field ${path.toString()})` : '';
 
   if (Array.isArray(value)) {
-    const arr = value as Array<unknown>;
+    const arr = value as unknown[];
     for (let i = 0; i < arr.length; ++i) {
       validateUserInput(
           arg, arr[i]!, desc, options,
diff --git a/synth.metadata b/synth.metadata
index 6d3a68eda..d43cb2696 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-02-13T12:15:47.405884Z",
+  "updateTime": "2019-02-24T12:13:23.461769Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.13",
-        "dockerImage": "googleapis/artman@sha256:5fd9aee1d82a00cebf425c8fa431f5457539562f5867ad9c54370f0ec9a7ccaa"
+        "version": "0.16.14",
+        "dockerImage": "googleapis/artman@sha256:f3d61ae45abaeefb6be5f228cda22732c2f1b00fb687c79c4bd4f2c42bb1e1a7"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "ca61898878f0926dd9dcc68ba90764f17133efe4",
-        "internalRef": "233680013"
+        "sha": "59f2494f1b00511bbb813d647cfbe95c949de0fe",
+        "internalRef": "235350912"
       }
     },
     {