diff --git a/Dockerfile b/Dockerfile
index 0ca854b..38fd721 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,8 +11,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     zlib1g-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Upgrade pip to latest version (security)
-RUN pip install --upgrade pip
+# Upgrade pip to latest version (security) - install to user directory
+RUN pip install --user --upgrade pip
 
 # Install Python dependencies
 COPY requirements.txt /tmp/