diff --git a/build.Dockerfile b/build.Dockerfile
index 8ae88a3..8d16061 100644
--- a/build.Dockerfile
+++ b/build.Dockerfile
@@ -23,7 +23,8 @@ python -m pipx ensurepath --force && \
 /home/pn/.local/bin/pipx install  "eth-brownie==1.19.2" --pip-args="cython<3.0 pyyaml>=5.4.1,<6 --no-build-isolation" && \
 python3 -m venv $VIRTUAL_ENV
 
-RUN pip install --no-cache-dir -r requirements.txt && python download_compilers.py && \
+RUN pip install --no-cache-dir "cython<3.0" "pyyaml>=5.4.1,<6" --no-build-isolation && \
+ pip install --no-cache-dir -r requirements.txt && python download_compilers.py && \
  brownie && rm ~/.brownie/deployments.db && \
  rm -rf ~/.local/lib && \
  rm -rf ~/.cache && \