diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f2d48ba..eb539e9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: ./
         with:
           path: |
-            a/b/c/file.txt
+            a/b
             file.txt
           key: cache-${{ github.run_id }}-${{ github.sha }}
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
@@ -33,7 +33,7 @@ jobs:
       - uses: ./
         with:
           path: |
-            a/b/c/file.txt
+            a/b
             file.txt
           key: cache-${{ github.run_id }}-${{ github.sha }}
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
@@ -53,7 +53,7 @@ jobs:
       - uses: ./
         with:
           path: |
-            a/b/c/file.txt
+            a/b
           key: cache-${{ github.run_id }}-${{ github.sha }}
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_ACCESS_SECRET }}
@@ -76,7 +76,7 @@ jobs:
       - uses: ./
         with:
           path: |
-            a/b/c/file.txt
+            a/b
           key: cache-${{ github.run_id }}-${{ github.sha }}
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_ACCESS_SECRET }}
diff --git a/README.md b/README.md
index 06f547e..3267ad7 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ steps:
       path: |
         path/to/file/a
         another/file
+        a/directory
       key: cache-${{ hashFiles('**/**.rs') }}
       aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
       aws-secret-access-key: ${{ secrets.AWS_ACCESS_SECRET }}
@@ -23,3 +24,9 @@ steps:
 Handle cache expiration ourselves.
 
 No restriction based on branches, [github-restrictions-for-accessing-a-cache](https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#restrictions-for-accessing-a-cache)
+
+# Implementation
+
+- zip every file (or directory recursively) in path
+- make a zip of all of them
+- upload the resulting zip with cache key as name