diff --git a/Dockerfile b/Dockerfile
index 56a7c6c..8584ea2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster
+FROM debian:bullseye
 
 RUN sed -i 's/ main/ main contrib non-free/' /etc/apt/sources.list
 RUN dpkg --add-architecture i386 && apt-get update && apt-get install -y \
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..9ffc426
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2021 Tim Schumacher <tim@timakro.de>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+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 OR COPYRIGHT HOLDERS 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.
diff --git a/newid b/newid
index fe3100f..5053dfa 100755
--- a/newid
+++ b/newid
@@ -13,7 +13,7 @@ fi
 wget -P container --no-clobber \
     http://download.adobe.com/pub/adobe/digitaleditions/ADE_2.0_Installer.exe \
     http://www.voidspace.org.uk/python/pycrypto-2.6.1/pycrypto-2.6.1.win32-py2.6.exe \
-    https://raw.githubusercontent.com/apprenticeharper/DeDRM_tools/master/DeDRM_plugin/adobekey.py \
+    https://raw.githubusercontent.com/apprenticeharper/DeDRM_tools/92bf51bc8f201a2d5b1e8b90b8dc033606dbcfb0/DeDRM_plugin/adobekey.py \
  || exit 1
 
 docker build --tag adobe_diged_docker .