diff --git a/substrate/scripts/init.sh b/substrate/scripts/init.sh
index ff6929d67c..5dde6d4241 100755
--- a/substrate/scripts/init.sh
+++ b/substrate/scripts/init.sh
@@ -4,9 +4,12 @@ set -e
 
 echo "*** Initialising WASM build environment"
 
-rustup update nightly
+if [ -z $CI_PROJECT_NAME ] ; then
+   rustup update nightly
+   rustup update stable
+fi
+
 rustup target add wasm32-unknown-unknown --toolchain nightly
-rustup update stable
 
 # Install wasm-gc. It's useful for stripping slimming down wasm binaries.
 command -v wasm-gc || \