diff --git a/Dockerfile b/Dockerfile
index c2035a7..de363c3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,7 +35,7 @@ RUN pip3 install imantics==0.1.12
 RUN pip3 install rdkit
 RUN pip3 install --no-deps decimer-segmentation==1.1.3
 RUN pip3 install --no-deps decimer==2.3.0
-RUN pip3 install --no-deps STOUT-pypi>=2.0.5
+RUN pip3 install --no-deps STOUT-pypi==2.0.5
 RUN python3 -m pip install uvicorn[standard]
 
 RUN pip3 install --no-cache-dir chembl_structure_pipeline --no-deps