diff --git a/repo2docker/detectors.py b/repo2docker/detectors.py
index c66204afd..502454d1a 100644
--- a/repo2docker/detectors.py
+++ b/repo2docker/detectors.py
@@ -492,7 +492,7 @@ class PythonBuildPack(BuildPack):
             "${NB_USER}",
             r"""
             pip install --no-cache-dir \
-                notebook==5.2.0 \
+                notebook==5.2.2 \
                 ipywidgets==6.0.0 \
                 jupyterlab==0.28 && \
             jupyter nbextension enable --py widgetsnbextension --sys-prefix && \
@@ -733,7 +733,7 @@ class LegacyBinderDockerBuildPack(DockerBuildPack):
     USER main
     WORKDIR /home/main/notebooks
     ENV PATH /home/main/anaconda2/envs/python3/bin:$PATH
-    RUN conda install -yq -n python3 notebook==5.0.0 ipykernel==4.6.0 && \
+    RUN conda install -yq -n python3 notebook==5.2.2 ipykernel==4.6.0 && \
         conda remove -yq -n python3 nb_conda_kernels && \
         conda install -yq -n root ipykernel==4.6.0 && \
         /home/main/anaconda2/envs/python3/bin/ipython kernel install --sys-prefix && \
diff --git a/repo2docker/files/conda/environment.yml b/repo2docker/files/conda/environment.yml
index 93a73600c..ff152d51e 100644
--- a/repo2docker/files/conda/environment.yml
+++ b/repo2docker/files/conda/environment.yml
@@ -1,6 +1,6 @@
 dependencies:
   - python==3.6.1
-  - notebook==5.2.0
+  - notebook==5.2.2
   - ipython==6.0.0
   - ipykernel==4.6.0
   - ipywidgets==6.0.0