diff --git a/backend/python/neutts/install.sh b/backend/python/neutts/install.sh
index 381788605..a5c52dba4 100755
--- a/backend/python/neutts/install.sh
+++ b/backend/python/neutts/install.sh
@@ -32,7 +32,14 @@ if [ "x${BUILD_PROFILE}" == "xl4t12" ]; then
 fi
 
 
-git clone https://github.com/neuphonic/neutts-air neutts-air
+git clone --depth 100 https://github.com/neuphonic/neutts-air neutts-air
+
+cd neutts-air
+
+git checkout 1737487debe5b40a0bb97875edce8c66b391722b
+
+cd ..
+
 
 cp -rfv neutts-air/neuttsair ./