diff --git a/ci-images/tox/Dockerfile b/ci-images/tox/Dockerfile
index 9907797..9dcb7e9 100644
--- a/ci-images/tox/Dockerfile
+++ b/ci-images/tox/Dockerfile
@@ -20,7 +20,7 @@
 
 RUN set -eux; \
     apt-get update; \
-    apt-get install -y --no-install-recommends patch wget libmagic-dev; \
+    apt-get install -y --no-install-recommends patch wget libmagic-dev curl; \
     rm -rf /var/lib/apt/lists/*
 
 COPY entrypoint.sh /entrypoint.sh