diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
new file mode 100644
index 0000000..c322317
--- /dev/null
+++ b/.github/workflows/semgrep.yml
@@ -0,0 +1,24 @@
+on:
+  workflow_dispatch: {}
+  pull_request: {}
+  push:
+    branches:
+    - main
+    - master
+    paths:
+    - .github/workflows/semgrep.yml
+  schedule:
+  # random HH:MM to avoid a load spike on GitHub Actions at 00:00
+  - cron: 12 1 * * *
+name: Semgrep
+jobs:
+  semgrep:
+    name: semgrep/ci
+    runs-on: ubuntu-20.04
+    env:
+      SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}
+    container:
+      image: returntocorp/semgrep
+    steps:
+    - uses: actions/checkout@v3
+    - run: semgrep ci
diff --git a/README.md b/README.md
index 6618db6..29f6f26 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+#for better use read and understand it carefully
+
 # Frequent
 frequent is a utility for crawling websites and building word frequency list. Mainly made because I wanted to be able to find top n most common words on different websites, but I imagine there might be more useful applications. Or not.