diff --git a/docker/Dockerfile b/docker/Dockerfile
index e4828b4..e3ea67a 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -17,7 +17,7 @@ RUN mkdir -p $HOME/.tools
 RUN echo 'export PATH="$HOME/.tools:$PATH"' >> $HOME/.profile
 
 # swift-format
-ARG swiftformat_version=508.0.1
+ARG swiftformat_version=509.0.0
 RUN git clone --branch $swiftformat_version --depth 1 https://github.com/apple/swift-format $HOME/.tools/swift-format-source
 RUN cd $HOME/.tools/swift-format-source && swift build -c release
 RUN ln -s $HOME/.tools/swift-format-source/.build/release/swift-format $HOME/.tools/swift-format