diff --git a/all-spark-notebook/Dockerfile b/all-spark-notebook/Dockerfile
index 39cff6b0..739cc665 100644
--- a/all-spark-notebook/Dockerfile
+++ b/all-spark-notebook/Dockerfile
@@ -51,7 +51,7 @@ RUN cd /tmp && \
 # Spark and Mesos pointers
 ENV SPARK_HOME /usr/local/spark
 ENV R_LIBS_USER $SPARK_HOME/R/lib
-ENV PYTHONPATH $SPARK_HOME/python:$SPARK_HOME/python/lib/py4j-0.8.2.1-src.zip
+ENV PYTHONPATH $SPARK_HOME/python:$SPARK_HOME/python/lib/py4j-0.9-src.zip
 ENV MESOS_NATIVE_LIBRARY /usr/local/lib/libmesos.so
 ENV SPARK_OPTS --driver-java-options=-Xms1024M --driver-java-options=-Xmx4096M --driver-java-options=-Dlog4j.logLevel=info
 
diff --git a/pyspark-notebook/Dockerfile b/pyspark-notebook/Dockerfile
index deaec2be..57c72f6a 100644
--- a/pyspark-notebook/Dockerfile
+++ b/pyspark-notebook/Dockerfile
@@ -32,7 +32,7 @@ RUN apt-key adv --keyserver keyserver.ubuntu.com --recv E56151BF && \
 
 # Spark and Mesos pointers
 ENV SPARK_HOME /usr/local/spark
-ENV PYTHONPATH $SPARK_HOME/python:$SPARK_HOME/python/lib/py4j-0.8.2.1-src.zip
+ENV PYTHONPATH $SPARK_HOME/python:$SPARK_HOME/python/lib/py4j-0.9-src.zip
 ENV MESOS_NATIVE_LIBRARY /usr/local/lib/libmesos.so
 
 USER jovyan