diff --git a/.github/workflows/lgtm.yml b/.github/workflows/lgtm.yml
index 5f0994f..e865bdc 100644
--- a/.github/workflows/lgtm.yml
+++ b/.github/workflows/lgtm.yml
@@ -8,17 +8,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1.0.0
-      - uses: micnncim/action-lgtm-reaction@v0.5.0
+      - uses: actions/checkout@v2
+      - uses: micnncim/action-lgtm-reaction@master
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIPHY_API_KEY: ${{ secrets.GIPHY_API_KEY }}
-          GITHUB_REPOSITORY: ${{ github.repository }}
-          GITHUB_ISSUE_NUMBER: ${{ github.event.issue.number }}
-          GITHUB_COMMENT_BODY: ${{ github.event.comment.body }}
-          GITHUB_COMMENT_ID: ${{ github.event.comment.id }}
-          GITHUB_PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number }}
-          GITHUB_REVIEW_BODY: ${{ github.event.review.body }}
-          GITHUB_REVIEW_ID: ${{ github.event.review.id }}
         with:
           override: true
+          source: 'giphy'
diff --git a/README.md b/README.md
index e38f2ae..50573e9 100644
--- a/README.md
+++ b/README.md
@@ -63,8 +63,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1.0.0
-      - uses: micnncim/action-lgtm-reaction@latest
+      - uses: actions/checkout@v2
+      - uses: micnncim/action-lgtm-reaction@master # Set some version.
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIPHY_API_KEY: ${{ secrets.GIPHY_API_KEY }}