diff --git a/.github/workflows/test_python.yml b/.github/workflows/test_python.yml
index 1adbc867d..bd2145583 100644
--- a/.github/workflows/test_python.yml
+++ b/.github/workflows/test_python.yml
@@ -55,7 +55,7 @@ jobs:
     - name: Setup environment
       run: |
         pip install -e .
-        pip install Cython==0.28.6
+        pip install Cython==0.29.19
     - run: buildozer --help
     - run: buildozer init
     - name: SDK, NDK and p4a download
diff --git a/Dockerfile b/Dockerfile
index 8764ee23e..38fd2dddb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -76,6 +76,6 @@ WORKDIR ${WORK_DIR}
 COPY --chown=user:user . ${SRC_DIR}
 
 # installs buildozer and dependencies
-RUN pip3 install --user --upgrade Cython==0.28.6 wheel pip virtualenv ${SRC_DIR}
+RUN pip3 install --user --upgrade Cython==0.29.19 wheel pip virtualenv ${SRC_DIR}
 
 ENTRYPOINT ["buildozer"]
diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index f93e143f0..34ac724e0 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -22,7 +22,7 @@ Android on Ubuntu 18.04 (64bit)
 
     sudo apt update
     sudo apt install -y git zip unzip openjdk-8-jdk python3-pip autoconf libtool pkg-config zlib1g-dev libncurses5-dev libncursesw5-dev libtinfo5 cmake libffi-dev libssl-dev
-    pip3 install --user --upgrade cython virtualenv  # the --user should be removed if you do this in a venv
+    pip3 install --user --upgrade Cython==0.29.19 virtualenv  # the --user should be removed if you do this in a venv
 
     # add the following line at the end of your ~/.bashrc file
     export PATH=$PATH:~/.local/bin/