diff --git a/README.md b/README.md
index fa132a7d..063e1f61 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ A JupyterLab debugger UI extension.
 
 ## Prerequisites
 
-- JupyterLab 1.1+
+- JupyterLab 1.2+
 - xeus-python 0.6.7+
 
 ## Installation
diff --git a/binder/environment.yml b/binder/environment.yml
index 2a152d2a..d0a52e21 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -2,7 +2,7 @@ name: jupyterlab-debugger
 channels:
 - conda-forge
 dependencies:
-- jupyterlab=1.1
+- jupyterlab=1.2
 - nodejs
 - notebook=6
 - ptvsd