diff --git a/Dockerfile b/Dockerfile
index 4db9b19..f0ccd2f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
 FROM debian
 
-ENV TOR_VERSION=8.5a1
+ENV TOR_VERSION=8.5a3
 # Via https://dist.torproject.org/torbrowser/$TOR_VERSION/sha256sums-signed-build.txt
-ENV SHA256_CHECKSUM=8aa4a98924217df1dfda7a69d31ebb14a9dc96398459da2ce54eb436a8eb7d88
+ENV SHA256_CHECKSUM=5079b8cf7ca0e0430c324dcb25257e39e8a8a98fc2aa6c22aadaf2981ac1adc2
 ENV LANG=C.UTF-8
 ENV RELEASE_FILE=tor-browser-linux64-${TOR_VERSION}_en-US.tar.xz
 ENV RELEASE_KEY=0x4E2C6E8793298290