diff --git a/ladder_build.sh b/ladder_build.sh
index f19f24c..094b406 100644
--- a/ladder_build.sh
+++ b/ladder_build.sh
@@ -1,5 +1,5 @@
 docker build . -f ./ladder_build/Dockerfile -t maextbuild
 id=$(docker create maextbuild)
-docker cp $id:./mapanalyzerext.so ./MapAnalyzer/cext/mapanalyzerext.so
+docker cp $id:./mapanalyzerext.so ./map_analyzer/cext/mapanalyzerext.so
 docker rm -v $id
 
diff --git a/ladder_build/Dockerfile b/ladder_build/Dockerfile
index 24aec7b..6946597 100644
--- a/ladder_build/Dockerfile
+++ b/ladder_build/Dockerfile
@@ -1,8 +1,9 @@
-FROM python:3.9.5
+FROM python:3.11.5
 
 COPY . .
 
-RUN python3.9 setup.py build_ext --inplace
-RUN mv mapanalyzerext.*.so mapanalyzerext.so
+RUN pip install poetry==1.6.1
+RUN poetry install
+RUN mv build/lib.linux*/mapanalyzerext.*.so mapanalyzerext.so
 
 CMD ["/bin/bash"]