diff --git a/cobalt/docker/linux/Dockerfile b/cobalt/docker/linux/Dockerfile
index e69bfa7f34b2..9534beb6eafb 100644
--- a/cobalt/docker/linux/Dockerfile
+++ b/cobalt/docker/linux/Dockerfile
@@ -25,6 +25,7 @@ RUN apt-get update && apt-get install -y \
     libpango-1.0-0 \
     gcc-multilib \
     bzip2 \
+    python3-certifi \
     && rm -rf /var/lib/apt/lists/*
 
 ADD files/sccache /usr/local/bin