diff --git a/README.md b/README.md
index fb7e7e2e..2437762a 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,16 @@ custom:
 
 - The Datadog Lambda Extension is now the default mechanism for transmitting telemetry to Datadog.
 
+## Working with serverless-plugin-warmup
+This library is compatible at best effort with [serverless-plugin-warmup](https://github.com/juanjoDiaz/serverless-plugin-warmup). If you want to exclude the warmer function from Datadog, use the `exclude` feature of this library.
+
+To properly package your application, this plugin *must* be listed _after_ `serverless-plugin-warmup` in your `serverless.yml` file:
+```yaml
+plugins:
+  - serverless-plugin-warmup
+  - serverless-plugin-datadog
+```
+
 ## Opening Issues
 
 If you encounter a bug with this package, let us know by filing an issue! Before opening a new issue, please search the existing issues to avoid duplicates.
diff --git a/src/index.spec.ts b/src/index.spec.ts
index 485bb3a4..0c828cc7 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -84,7 +84,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -134,7 +134,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -181,7 +181,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -230,7 +230,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -275,7 +275,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -321,7 +321,7 @@ describe("ServerlessPlugin", () => {
       };
 
       const plugin = new ServerlessPlugin(serverless, {});
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
       expect(serverless).toMatchObject({
         service: {
           functions: {
@@ -374,7 +374,7 @@ describe("ServerlessPlugin", () => {
     };
 
     const plugin = new ServerlessPlugin(serverless, {});
-    await plugin.hooks["after:package:initialize"]();
+    await plugin.hooks["before:package:createDeploymentArtifacts"]();
     expect(serverless).toMatchObject({
       service: {
         functions: {
@@ -422,7 +422,7 @@ describe("ServerlessPlugin", () => {
     };
 
     const plugin = new ServerlessPlugin(serverless, {});
-    await plugin.hooks["after:package:initialize"]();
+    await plugin.hooks["before:package:createDeploymentArtifacts"]();
     expect(serverless).toMatchObject({
       service: {
         functions: {
@@ -470,7 +470,7 @@ describe("ServerlessPlugin", () => {
     };
 
     const plugin = new ServerlessPlugin(serverless, {});
-    await plugin.hooks["after:package:initialize"]();
+    await plugin.hooks["before:package:createDeploymentArtifacts"]();
     expect(serverless).toMatchObject({
       service: {
         functions: {
@@ -518,7 +518,7 @@ describe("ServerlessPlugin", () => {
     };
 
     const plugin = new ServerlessPlugin(serverless, {});
-    await plugin.hooks["after:package:initialize"]();
+    await plugin.hooks["before:package:createDeploymentArtifacts"]();
     expect(serverless).toMatchObject({
       service: {
         functions: {
@@ -578,7 +578,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -620,7 +620,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -660,7 +660,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -700,7 +700,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -739,7 +739,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -783,7 +783,7 @@ describe("ServerlessPlugin", () => {
       const plugin = new ServerlessPlugin(serverless, {});
       let threwError: boolean = false;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -822,7 +822,7 @@ describe("ServerlessPlugin", () => {
       let threwError: boolean = false;
       let thrownErrorMessage: string | undefined;
       try {
-        await plugin.hooks["after:package:initialize"]();
+        await plugin.hooks["before:package:createDeploymentArtifacts"]();
       } catch (e) {
         threwError = true;
         if (e instanceof Error) {
@@ -869,7 +869,7 @@ describe("ServerlessPlugin", () => {
     const plugin = new ServerlessPlugin(serverless, {});
     let threwError: boolean = false;
     try {
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
     } catch (e) {
       threwError = true;
     }
@@ -909,7 +909,7 @@ describe("ServerlessPlugin", () => {
     const plugin = new ServerlessPlugin(serverless, {});
     let threwError: boolean = false;
     try {
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
     } catch (e) {
       threwError = true;
     }
@@ -947,7 +947,7 @@ describe("ServerlessPlugin", () => {
     let threwError: boolean = false;
     let thrownErrorMessage: string | undefined;
     try {
-      await plugin.hooks["after:package:initialize"]();
+      await plugin.hooks["before:package:createDeploymentArtifacts"]();
     } catch (e) {
       threwError = true;
       if (e instanceof Error) {
diff --git a/src/index.ts b/src/index.ts
index c5237ab9..dd85ec9a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -68,7 +68,7 @@ module.exports = class ServerlessPlugin {
     "after:datadog:generate:init": this.beforePackageFunction.bind(this),
     "after:deploy:function:packageFunction": this.afterPackageFunction.bind(this),
     "after:package:createDeploymentArtifacts": this.afterPackageFunction.bind(this),
-    "after:package:initialize": this.beforePackageFunction.bind(this),
+    "before:package:createDeploymentArtifacts": this.beforePackageFunction.bind(this),
     "after:package:compileFunctions": this.afterPackageCompileFunctions.bind(this),
     "before:deploy:function:packageFunction": this.beforePackageFunction.bind(this),
     "before:offline:start:init": this.beforePackageFunction.bind(this),