diff --git a/.projen/tasks.json b/.projen/tasks.json
index dbdf55d4d92..4ccd8a11212 100644
--- a/.projen/tasks.json
+++ b/.projen/tasks.json
@@ -253,6 +253,10 @@
         }
       ]
     },
+    "post-upgrade": {
+      "name": "post-upgrade",
+      "description": "Runs after upgrading dependencies"
+    },
     "pre-compile": {
       "name": "pre-compile",
       "description": "Prepare the project for compilation"
@@ -370,6 +374,9 @@
         },
         {
           "exec": "/bin/bash ./projen.bash"
+        },
+        {
+          "spawn": "post-upgrade"
         }
       ]
     },
diff --git a/API.md b/API.md
index 38772518b73..d085de70b93 100644
--- a/API.md
+++ b/API.md
@@ -7555,6 +7555,7 @@ new javascript.UpgradeDependencies(project: NodeProject, options?: UpgradeDepend
 Name | Type | Description 
 -----|------|-------------
 **ignoresProjen**🔹 | <code>boolean</code> | Whether or not projen is also upgraded in this workflow,.
+**postUpgradeTask**🔹 | <code>[Task](#projen-task)</code> | A task run after the upgrade task.
 **workflows**🔹 | <code>Array<[github.GithubWorkflow](#projen-github-githubworkflow)></code> | The workflows that execute the upgrades.
 **containerOptions**?🔹 | <code>[github.workflows.ContainerOptions](#projen-github-workflows-containeroptions)</code> | Container definitions for the upgrade workflow.<br/>__*Optional*__
 
diff --git a/package.json b/package.json
index c3e04640a64..39e6ea23d77 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "package:js": "/bin/bash ./projen.bash package:js",
     "package:python": "/bin/bash ./projen.bash package:python",
     "post-compile": "/bin/bash ./projen.bash post-compile",
+    "post-upgrade": "/bin/bash ./projen.bash post-upgrade",
     "pre-compile": "/bin/bash ./projen.bash pre-compile",
     "readme-macros": "/bin/bash ./projen.bash readme-macros",
     "release": "/bin/bash ./projen.bash release",
diff --git a/src/javascript/upgrade-dependencies.ts b/src/javascript/upgrade-dependencies.ts
index 717f81e9e8f..5d798fa09de 100644
--- a/src/javascript/upgrade-dependencies.ts
+++ b/src/javascript/upgrade-dependencies.ts
@@ -106,6 +106,11 @@ export class UpgradeDependencies extends Component {
    */
   public containerOptions?: ContainerOptions;
 
+  /**
+   * A task run after the upgrade task.
+   */
+  public readonly postUpgradeTask: Task;
+
   private readonly gitIdentity: GitIdentity;
   private readonly postBuildSteps: JobStep[];
 
@@ -122,6 +127,12 @@ export class UpgradeDependencies extends Component {
     this.containerOptions = options.workflowOptions?.container;
 
     project.addDevDeps("npm-check-updates@^12");
+
+    this.postUpgradeTask =
+      project.tasks.tryFind("post-upgrade") ??
+      project.tasks.addTask("post-upgrade", {
+        description: "Runs after upgrading dependencies",
+      });
   }
 
   /**
@@ -197,6 +208,8 @@ export class UpgradeDependencies extends Component {
     // run "projen" to give projen a chance to update dependencies (it will also run "yarn install")
     task.exec(this._project.projenCommand);
 
+    task.spawn(this.postUpgradeTask);
+
     return task;
   }
 
diff --git a/test/__snapshots__/integ.test.ts.snap b/test/__snapshots__/integ.test.ts.snap
index a02a90289fb..434f1bb39e4 100644
--- a/test/__snapshots__/integ.test.ts.snap
+++ b/test/__snapshots__/integ.test.ts.snap
@@ -1334,6 +1334,10 @@ UNEXPECTED BREAKING CHANGES: add keys such as 'removed:constructs.Node.of' to .c
           },
         ],
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -1438,6 +1442,9 @@ UNEXPECTED BREAKING CHANGES: add keys such as 'removed:constructs.Node.of' to .c
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "watch": Object {
@@ -1879,6 +1886,7 @@ project.synth();
       "package:js": "npx projen package:js",
       "package:python": "npx projen package:python",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "release": "npx projen release",
@@ -2762,6 +2770,10 @@ UNEXPECTED BREAKING CHANGES: add keys such as 'removed:constructs.Node.of' to .c
           },
         ],
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -2830,6 +2842,9 @@ UNEXPECTED BREAKING CHANGES: add keys such as 'removed:constructs.Node.of' to .c
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -2863,6 +2878,9 @@ UNEXPECTED BREAKING CHANGES: add keys such as 'removed:constructs.Node.of' to .c
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "watch": Object {
@@ -3424,6 +3442,7 @@ project.synth();
       "package:js": "npx projen package:js",
       "package:python": "npx projen package:python",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "test": "npx projen test",
@@ -4217,6 +4236,10 @@ tsconfig.tsbuildinfo
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -4285,6 +4308,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -4318,6 +4344,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "watch": Object {
@@ -4828,6 +4857,7 @@ project.synth();
       "eslint": "npx projen eslint",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "test": "npx projen test",
@@ -5504,6 +5534,10 @@ junit.xml
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -5605,6 +5639,9 @@ junit.xml
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -5638,6 +5675,9 @@ junit.xml
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
     },
@@ -5919,6 +5959,7 @@ project.synth();
       "default": "npx projen default",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "release": "npx projen release",
diff --git a/test/node-project.test.ts b/test/node-project.test.ts
index 467c57ae713..e524da66225 100644
--- a/test/node-project.test.ts
+++ b/test/node-project.test.ts
@@ -807,6 +807,18 @@ describe("workflowRunsOn", () => {
   });
 });
 
+test("post-upgrade workflow", () => {
+  // GIVEN
+  const project = new TestNodeProject();
+
+  // THEN
+  const snapshot = synthSnapshot(project);
+  const tasks = snapshot[Tasks.MANIFEST_FILE].tasks;
+  expect(tasks.upgrade.steps[tasks.upgrade.steps.length - 1]).toStrictEqual({
+    spawn: "post-upgrade",
+  });
+});
+
 class TestNodeProject extends NodeProject {
   constructor(options: Partial<NodeProjectOptions> = {}) {
     super({
diff --git a/test/web/__snapshots__/nextjs-project.test.ts.snap b/test/web/__snapshots__/nextjs-project.test.ts.snap
index be4cf4a51c1..ff6f384aacc 100644
--- a/test/web/__snapshots__/nextjs-project.test.ts.snap
+++ b/test/web/__snapshots__/nextjs-project.test.ts.snap
@@ -582,6 +582,10 @@ pull_request_rules:
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -678,6 +682,9 @@ pull_request_rules:
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -711,6 +718,9 @@ pull_request_rules:
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
     },
@@ -955,6 +965,7 @@ pull_request_rules:
       "export": "npx projen export",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "release": "npx projen release",
diff --git a/test/web/__snapshots__/nextjs-ts-project.test.ts.snap b/test/web/__snapshots__/nextjs-ts-project.test.ts.snap
index aec47d26f9e..75ae2f18dcb 100644
--- a/test/web/__snapshots__/nextjs-ts-project.test.ts.snap
+++ b/test/web/__snapshots__/nextjs-ts-project.test.ts.snap
@@ -513,6 +513,10 @@ tsconfig.tsbuildinfo
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -570,6 +574,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -603,6 +610,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "watch": Object {
@@ -857,6 +867,7 @@ tsconfig.tsbuildinfo
       "export": "npx projen export",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "server": "npx projen server",
diff --git a/test/web/__snapshots__/react-project.test.ts.snap b/test/web/__snapshots__/react-project.test.ts.snap
index d887bd7e704..e8f68d6df0d 100644
--- a/test/web/__snapshots__/react-project.test.ts.snap
+++ b/test/web/__snapshots__/react-project.test.ts.snap
@@ -567,6 +567,10 @@ pull_request_rules:
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -650,6 +654,9 @@ pull_request_rules:
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -683,6 +690,9 @@ pull_request_rules:
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
     },
@@ -937,6 +947,7 @@ pull_request_rules:
       "eject": "npx projen eject",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "release": "npx projen release",
diff --git a/test/web/__snapshots__/react-ts-project.test.ts.snap b/test/web/__snapshots__/react-ts-project.test.ts.snap
index 1c3380a3b4d..6c83e840bd8 100644
--- a/test/web/__snapshots__/react-ts-project.test.ts.snap
+++ b/test/web/__snapshots__/react-ts-project.test.ts.snap
@@ -508,6 +508,10 @@ tsconfig.tsbuildinfo
         "description": "Runs after successful compilation",
         "name": "post-compile",
       },
+      "post-upgrade": Object {
+        "description": "Runs after upgrading dependencies",
+        "name": "post-upgrade",
+      },
       "pre-compile": Object {
         "description": "Prepare the project for compilation",
         "name": "pre-compile",
@@ -552,6 +556,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "upgrade-projen": Object {
@@ -585,6 +592,9 @@ tsconfig.tsbuildinfo
           Object {
             "exec": "npx projen",
           },
+          Object {
+            "spawn": "post-upgrade",
+          },
         ],
       },
       "watch": Object {
@@ -850,6 +860,7 @@ tsconfig.tsbuildinfo
       "eject": "npx projen eject",
       "package": "npx projen package",
       "post-compile": "npx projen post-compile",
+      "post-upgrade": "npx projen post-upgrade",
       "pre-compile": "npx projen pre-compile",
       "projen": "npx projen",
       "test": "npx projen test",