diff --git a/Dockerfile b/Dockerfile
index 800ab2a3..fab4822b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,6 @@ WORKDIR /app
 EXPOSE 8080
 ADD nginx.conf.sigil ./
 COPY requirements.txt .
-RUN apt update && apt install -y build-essentials
+RUN apt update && apt install -y build-essential
 RUN pip install -r requirements.txt
 COPY . .