diff --git a/package.json b/package.json
index 59a978a..c0915c3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "netlify-plugin-ttl-cache",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "A Netlify plugin for persisting immutable build assets across releases.",
   "keywords": [
     "netlify",
diff --git a/src/index.js b/src/index.js
index 9b4e043..1b8623d 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,4 @@
-const { stat, unlink } = require("fs").promises;
+const { stat, unlink, rmdir } = require("fs").promises;
 const { getDaysApart, getDirFilenames, addTrailingSlash } = require("./utils");
 
 const TMP_CACHE_DIR = ".netlify-plugin-ttl-cache";
@@ -38,6 +38,7 @@ const onPostBuild = async ({ utils, inputs }) => {
       addTrailingSlash(TMP_CACHE_DIR),
       addTrailingSlash(inputs.path),
     ]);
+    await rmdir(TMP_CACHE_DIR, { recursive: true });
   }
 
   // Save new cache
diff --git a/src/index.test.js b/src/index.test.js
index 632c917..cc8bf6e 100644
--- a/src/index.test.js
+++ b/src/index.test.js
@@ -2,13 +2,14 @@ jest.mock("fs", () => ({
   promises: {
     stat: jest.fn(),
     unlink: jest.fn(),
+    rmdir: jest.fn(),
   },
 }));
 jest.mock("./utils", () => ({
   ...jest.requireActual("./utils"),
   getDirFilenames: jest.fn(),
 }));
-const { stat, unlink } = require("fs").promises;
+const { stat, unlink, rmdir } = require("fs").promises;
 const { onPreBuild, onPostBuild } = require("./index");
 const { getDirFilenames } = require("./utils");
 
@@ -144,5 +145,18 @@ describe("on onPostBuild", () => {
       expect(utils.cache.save).toBeCalledTimes(1);
       expect(utils.cache.save).toBeCalledWith(inputs.path);
     });
+
+    it("removes old cache directory", async () => {
+      await onPostBuild({ inputs, utils });
+      expect(rmdir).toBeCalledTimes(1);
+      expect(rmdir.mock.calls[0]).toMatchInlineSnapshot(`
+Array [
+  ".netlify-plugin-ttl-cache",
+  Object {
+    "recursive": true,
+  },
+]
+`);
+    });
   });
 });