diff --git a/Dockerfile b/Dockerfile
index d04478d..806e4f9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -155,6 +155,8 @@ RUN chmod +x /usr/bin/openstreetmap-tiles-update-expire \
 USER renderer
 RUN cd ~/src \
     && git clone https://github.com/zverik/regional \
+    && cd regional \
+    && git checkout 612fe3e040d8bb70d2ab3b133f3b2cfc6c940520 \
     && chmod u+x ~/src/regional/trim_osc.py
 
 # Start running