diff --git a/repo2docker/files/conda/environment.yml b/repo2docker/files/conda/environment.yml
index 95b7e152..76c12272 100644
--- a/repo2docker/files/conda/environment.yml
+++ b/repo2docker/files/conda/environment.yml
@@ -4,4 +4,4 @@ dependencies:
   - ipython==6.0.0
   - ipykernel==4.6.0
   - ipywidgets==6.0.0
-  - jupyterlab==0.27
+  - jupyterlab==0.28