diff --git a/Containerfile b/Containerfile
index 92be453..7d4cc0e 100644
--- a/Containerfile
+++ b/Containerfile
@@ -20,7 +20,7 @@ COPY --link files/requirements.yml /ansible/requirements.yml
 COPY --link files/scripts/* /
 COPY --link files/src /src
 
-ADD https://github.com/mitogen-hq/mitogen/archive/refs/tags/v0.3.7.tar.gz /mitogen.tar.gz
+ADD https://github.com/mitogen-hq/mitogen/archive/refs/tags/v0.3.9.tar.gz /mitogen.tar.gz
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]