diff --git a/Dockerfile b/Dockerfile
index 60e82e0f..384a5021 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -66,7 +66,7 @@ RUN eval.sh clean_bt && \
 FROM ea-tester-base AS ea-tester-with-mt5
 
 # Install platform.
-ARG MT_VER=5.0.0.3802
+ARG MT_VER=4
 ENV MT_VER $MT_VER
 RUN eval.sh install_mt $MT_VER
 #RUN run_backtest.sh -s PrintPaths -v