diff --git a/installer/Dockerfile b/installer/Dockerfile
index bd460bf8a..9c5cdaf49 100644
--- a/installer/Dockerfile
+++ b/installer/Dockerfile
@@ -22,7 +22,7 @@ RUN mkdir -p /opt/maxkb/app /opt/maxkb/model /opt/maxkb/conf && \
 COPY --from=web-build ui /opt/maxkb/app/ui
 WORKDIR /opt/maxkb/app
 RUN python3 -m venv /opt/py3 && \
-    pip install poetry --break-system-packages && \
+    pip install poetry==1.8.5 --break-system-packages && \
     poetry config virtualenvs.create false && \
     . /opt/py3/bin/activate && \
     if [ "$(uname -m)" = "x86_64" ]; then sed -i 's/^torch.*/torch = {version = "^2.2.1+cpu", source = "pytorch"}/g' pyproject.toml; fi && \