diff --git a/docker/Dockerfile.sandbox b/docker/Dockerfile.sandbox
index 55bc1bbb..382a2c43 100644
--- a/docker/Dockerfile.sandbox
+++ b/docker/Dockerfile.sandbox
@@ -10,6 +10,7 @@ ARG EXTRA_PYTHON_PACKAGES=""
 
 # Install common utilities + optional apt packages
 RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
     curl \
     wget \
     jq \
@@ -19,13 +20,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     tree \
     unzip \
     ${EXTRA_APT_PACKAGES} \
+    && update-ca-certificates \
     && rm -rf /var/lib/apt/lists/* \
     && apt-get clean
 
-# Install uv for fast Python package management (in shared location)
-RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
-    && mv /root/.local/bin/uv /usr/local/bin/uv \
-    && mv /root/.local/bin/uvx /usr/local/bin/uvx
+# Install uv for fast Python package management
+RUN pip install --no-cache-dir uv
 
 # Copy workspace packages
 COPY packages/ash-rpc-protocol /tmp/ash-rpc-protocol