diff --git a/Dockerfile b/Dockerfile
index 621359e..e3a226b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,11 @@
-FROM public.ecr.aws/lambda/python:3.8 as build
+FROM public.ecr.aws/lambda/python:3.9 as build
 RUN yum install -y unzip && \
     curl -SL https://chromedriver.storage.googleapis.com/2.43/chromedriver_linux64.zip > /tmp/chromedriver.zip && \
     curl -SL https://github.com/adieuadieu/serverless-chrome/releases/download/v1.0.0-55/stable-headless-chromium-amazonlinux-2017-03.zip > /tmp/headless-chromium.zip && \
     unzip /tmp/chromedriver.zip -d /opt/ && \
     unzip /tmp/headless-chromium.zip -d /opt/
 
-FROM public.ecr.aws/lambda/python:3.8
+FROM public.ecr.aws/lambda/python:3.9
 RUN yum install -y https://dl.google.com/linux/direct/google-chrome-stable_current_x86_64.rpm
 RUN pip install selenium
 COPY --from=build /opt/headless-chromium /opt/
diff --git a/README.md b/README.md
index b67611e..868a754 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ This is minimum demo of headless chrome and selenium on container image on AWS L
 
 This image goes with these versions.
 
-- Python 3.8
+- Python 3.9
 - serverless-chrome v1.0.0-55
   - chromium 69.0.3497.81 (stable channel) for amazonlinux:2017.03
 - chromedriver 2.43