diff --git a/bin/env.sh b/bin/env.sh
index c1418eccad9e493d57d2553c3b391b2cb0ae52ea..4d3eea1e4b2cc191c37cec837e8fd304f063fa2c 100755
--- a/bin/env.sh
+++ b/bin/env.sh
@@ -62,7 +62,7 @@ export JUGGLER_N_EVENTS=${BENCHMARK_N_EVENTS}
 if [ "${BEAMLINE}" ] ; then
 
   if [ ! -n  "${BEAMLINE_VERSION}" ] ; then 
-    export BEAMLINE_VERSION="master"
+    export BEAMLINE_VERSION="main"
   fi
 
   if [ ! -n  "${BEAMLINE_REPOSITORYURL}" ] ; then