diff --git a/.github/workflows/lgtm.yml b/.github/workflows/lgtm.yml
new file mode 100644
index 000000000..61c91e5cc
--- /dev/null
+++ b/.github/workflows/lgtm.yml
@@ -0,0 +1,18 @@
+name: Send LGTM reaction
+on:
+  issue_comment:
+    types: [created]
+  pull_request_review:
+    types: [submitted]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@1.0.0
+      - uses: micnncim/action-lgtm-reaction@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GIPHY_API_KEY: ${{ secrets.GIPHY_API_KEY }}
+        with:
+          trigger: '["^(?i)lgtm!*$"]'
+          source: 'giphy'