diff --git a/README.md b/README.md
index f236464..00f683d 100644
--- a/README.md
+++ b/README.md
@@ -11,18 +11,25 @@ Pass all sensitive data using secrets.
 
 **Required** Google Service Account Key.
 
-### `google_compute_zone`
+### `gcr_host`
 
-### `google_project_id`
+Google Container Registry Host
 
-### `gcr_host`
+- gcrp.io (default)
+- eu.gcr.ui
+- etc
 
 ### `image_name`
 
+Name of the image. Should be specified without domain and project.
+
 ### `image_tag`
 
+Image tag to set for the built image.
+
 ## Example usage
 
+```ylm
 uses: raccoondev/push-docker-gcr
 with:
   gcr_host: eu.gcr.io
@@ -31,4 +38,5 @@ with:
   env:
     GCLOUD_SERVICE_KEY: ${{ secrets.GCLOUD_SERVICE_KEY }}
     GOOGLE_COMPUTE_ZONE: ${{ secrets.GOOGLE_COMPUTE_ZONE }}
-    GOOGLE_PROJECT_ID: ${{ secrets.GOOGLE_PROJECT_ID }}
\ No newline at end of file
+    GOOGLE_PROJECT_ID: ${{ secrets.GOOGLE_PROJECT_ID }}
+```
\ No newline at end of file