diff --git a/.readthedocs.yml b/.readthedocs.yml
index f5ad9775d4..8f92ee7e9d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -16,16 +16,16 @@
 #
 
 # .readthedocs.yml
-build:
-  image: stable
-conda:
-  environment: doc/environment.yml
-python:
-    version: 3.7
-
-# Required
 version: 2
 
-# Build documentation in the docs/ directory with Sphinx
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.9"
+
 sphinx:
-  configuration: doc/conf.py
\ No newline at end of file
+  configuration: doc/conf.py
+
+python:
+  install:
+    - requirements: doc/requirements.txt
diff --git a/doc/environment.yml b/doc/environment.yml
deleted file mode 100644
index 38b97fbfbf..0000000000
--- a/doc/environment.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-#
-# singa documentation build configuration file, created by
-# sphinx-quickstart on Sat Jul  9 20:36:57 2016.
-#
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-
-name: singa
-channels:
-  - shicong
-  - conda-forge
-dependencies:
-  - singa=3.0.0.rc0=cpu_py37 [--no-deps]
-  - python_abi=3.7 [--no-deps]
\ No newline at end of file
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000000..b1b732ea48
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,6 @@
+sphinx==6.2.1
+sphinx-rtd-theme==1.2.2
+pillow==5.4.1
+mock==1.0.1
+commonmark==0.9.1
+recommonmark==0.5.0