diff --git a/kibana-notebooks/package.json b/kibana-notebooks/package.json
index 74de450..f95eaea 100644
--- a/kibana-notebooks/package.json
+++ b/kibana-notebooks/package.json
@@ -19,7 +19,7 @@
     "test:server": "yarn plugin-helpers test:server",
     "test:browser": "yarn plugin-helpers test:browser",
     "test:cypress": "cypress run",
-    "postinstall": "yarn run babel node_modules/@nteract/markdown/lib -d node_modules/@nteract/markdown/lib; yarn run babel node_modules/@nteract/mathjax/lib -d node_modules/@nteract/mathjax/lib; yarn run babel node_modules/@nteract/outputs/lib -d node_modules/@nteract/outputs/lib; yarn run babel node_modules/@nteract/presentational-components/lib -d node_modules/@nteract/presentational-components/lib; yarn run babel node_modules/ansi-to-react/lib -d node_modules/ansi-to-react/lib;"
+    "postinstall": "yarn run babel node_modules/@nteract/markdown/lib -d node_modules/@nteract/markdown/lib && yarn run babel node_modules/@nteract/mathjax/lib -d node_modules/@nteract/mathjax/lib && yarn run babel node_modules/@nteract/outputs/lib -d node_modules/@nteract/outputs/lib && yarn run babel node_modules/@nteract/presentational-components/lib -d node_modules/@nteract/presentational-components/lib && yarn run babel node_modules/ansi-to-react/lib -d node_modules/ansi-to-react/lib"
   },
   "devDependencies": {
     "cypress": "^5.0.0",