diff --git a/update_license/UNLICENSE b/update_license/UNLICENSE
new file mode 100644
index 0000000..1e9858b
--- /dev/null
+++ b/update_license/UNLICENSE
@@ -0,0 +1,25 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org>
+
diff --git a/update_license/main.py b/update_license/main.py
new file mode 100644
index 0000000..6985f1e
--- /dev/null
+++ b/update_license/main.py
@@ -0,0 +1,50 @@
+import base64, requests
+
+
+def main():
+    s = requests.Session()
+    s.headers = {
+        "Authorization": "token ***REMOVED***",
+        "Accept": "application/json",
+    }
+    res = s.get("https://git.augendre.info/api/v1/repos/search?limit=100")
+    res.raise_for_status()
+    repos = res.json()
+    with open("UNLICENSE", "rb") as f:
+        unlicense = base64.b64encode(f.read()).decode("utf-8")
+    for repo in repos["data"]:
+        full_name = repo["full_name"]
+        url = repo["html_url"]
+        license_url = f"https://git.augendre.info/api/v1/repos/{full_name}/contents/LICENSE"
+        res = s.get(license_url)
+        if res.status_code != 200:
+            print(f"No LICENSE -> Public domain : {url}")
+            res = s.post(license_url, json={"content": unlicense})
+            if res.status_code != 201:
+                print("issue creating license")
+            continue
+        license_json = res.json()
+        license = base64.b64decode(license_json["content"]).decode("utf-8")
+        should_change = True
+        if "GNU" in license:
+            print(f"GPL -> Public domain : {url}")
+        elif "MIT" in license:
+            print(f"MIT -> Public domain : {url}")
+        elif "DO WHAT THE FUCK YOU WANT TO" in license:
+            print(f"WTFPL -> Public domain : {url}")
+        elif "public domain" in license:
+            print(f"Public domain : {url}")
+            should_change = False
+        else:
+            print(f"UNKNOWN : {url}")
+            should_change = False
+
+        if should_change:
+            current_sha = license_json["sha"]
+            res = s.put(license_url, json={"content": unlicense, "sha": current_sha})
+            if res.status_code != 200:
+                print("issue updating license")
+
+
+if __name__ == "__main__":
+    main()