diff --git a/action/dist/index.js b/action/dist/index.js
index 5e2c6d4..ac3d754 100644
--- a/action/dist/index.js
+++ b/action/dist/index.js
@@ -8394,7 +8394,7 @@ exports.main = function (_a) {
                     folder = path.resolve(process.cwd(), config.folder);
                     log.log("##[info] Copying all files from " + folder);
                     // TODO: replace this copy with a node implementation
-                    return [4 /*yield*/, exports.exec("cp -rT " + folder + "/ ./", { log: log, env: childEnv, cwd: REPO_TEMP })];
+                    return [4 /*yield*/, exports.exec("cp -rT \"" + folder + "\"/ ./", { log: log, env: childEnv, cwd: REPO_TEMP })];
                 case 26:
                     // TODO: replace this copy with a node implementation
                     _j.sent();
diff --git a/action/src/index.ts b/action/src/index.ts
index 4749f55..e73a3b5 100644
--- a/action/src/index.ts
+++ b/action/src/index.ts
@@ -521,7 +521,7 @@ export const main = async ({
   const folder = path.resolve(process.cwd(), config.folder);
   log.log(`##[info] Copying all files from ${folder}`);
   // TODO: replace this copy with a node implementation
-  await exec(`cp -rT ${folder}/ ./`, { log, env: childEnv, cwd: REPO_TEMP });
+  await exec(`cp -rT "${folder}"/ ./`, { log, env: childEnv, cwd: REPO_TEMP });
   await exec(`git add -A .`, { log, env: childEnv, cwd: REPO_TEMP });
   const message = config.message
     .replace(/\{target\-branch\}/g, config.branch)
diff --git a/action/test/specs/__snapshots__/ssh-existing-branch-folder-space.spec.ts.snap b/action/test/specs/__snapshots__/ssh-existing-branch-folder-space.spec.ts.snap
new file mode 100644
index 0000000..dff6607
--- /dev/null
+++ b/action/test/specs/__snapshots__/ssh-existing-branch-folder-space.spec.ts.snap
@@ -0,0 +1,10 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Spaces in folder names are correctly handled 1`] = `
+"msg:Update master to output generated at <sha>
+tree:3f97adec519b4ce0c5950da8eb91bd2939d20689
+author:s0 <s0@users.noreply.github.com>
+msg:initial
+tree:c1cde76c408d7c8cb6956f35f1e4853366340aec
+author:Test User <test@example.com>"
+`;
diff --git a/action/test/specs/ssh-existing-branch-folder-space.spec.ts b/action/test/specs/ssh-existing-branch-folder-space.spec.ts
new file mode 100644
index 0000000..262a106
--- /dev/null
+++ b/action/test/specs/ssh-existing-branch-folder-space.spec.ts
@@ -0,0 +1,66 @@
+import * as path from 'path';
+
+import * as util from '../util';
+
+const REPO_DIR = path.join(
+  util.REPOS_DIR,
+  'ssh-existing-branch-folder-space.git'
+);
+const WORK_DIR = path.join(util.DATA_DIR, 'ssh-existing-branch-folder-space');
+const REPO_CLONE_DIR = path.join(WORK_DIR, 'clone');
+const DATA_DIR = path.join(WORK_DIR, 'data with space');
+
+it('Spaces in folder names are correctly handled', async () => {
+  // Create empty repo
+  await util.mkdir(REPO_DIR);
+  await util.wrappedExec('git init --bare', { cwd: REPO_DIR });
+
+  // Clone repo, and create an initial commit
+  await util.mkdir(WORK_DIR);
+  await util.wrappedExec(`git clone "${REPO_DIR}" clone`, { cwd: WORK_DIR });
+  await util.writeFile(path.join(REPO_CLONE_DIR, 'initial'), 'foobar');
+  await util.wrappedExec(`git add -A .`, { cwd: REPO_CLONE_DIR });
+  await util.wrappedExec(`git config user.name "Test User"`, {
+    cwd: REPO_CLONE_DIR,
+  });
+  await util.wrappedExec(`git config user.email "test@example.com"`, {
+    cwd: REPO_CLONE_DIR,
+  });
+  await util.wrappedExec(`git commit -m initial`, { cwd: REPO_CLONE_DIR });
+  await util.wrappedExec(`git push origin master`, { cwd: REPO_CLONE_DIR });
+
+  // Create dummy data
+  await util.mkdir(DATA_DIR);
+  await util.mkdir(path.join(DATA_DIR, 'dummy foo'));
+  await util.writeFile(path.join(DATA_DIR, 'dummy foo', 'baz'), 'foobar');
+  await util.writeFile(path.join(DATA_DIR, 'dummy foo', '.bat'), 'foobar');
+
+  // Run Action
+  await util.runWithGithubEnv(
+    path.basename(__filename),
+    {
+      REPO: 'ssh://git@git-ssh/git-server/repos/ssh-existing-branch-folder-space.git',
+      BRANCH: 'master',
+      FOLDER: DATA_DIR,
+      SSH_PRIVATE_KEY: (await util.readFile(util.SSH_PRIVATE_KEY)).toString(),
+      KNOWN_HOSTS_FILE: util.KNOWN_HOSTS,
+    },
+    's0/test',
+    {},
+    's0'
+  );
+
+  // Check that the log of the repo is as expected
+  // (check tree-hash, commit message, and author)
+  const log = (
+    await util.exec(
+      'git log --pretty="format:msg:%s%ntree:%T%nauthor:%an <%ae>" master',
+      {
+        cwd: REPO_DIR,
+      }
+    )
+  ).stdout;
+  const sha = await util.getRepoSha();
+  const cleanedLog = log.replace(sha, '<sha>');
+  expect(cleanedLog).toMatchSnapshot();
+});