diff --git a/Dockerfile b/Dockerfile
index d3e1552..e2910b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,13 +2,13 @@ from python:3.11
 RUN pip install --upgrade pip poetry
 COPY pyproject.toml poetry.lock /
 
-RUN apt install -y /
-    libcairo2-dev /
-    libfreetype6-dev /
-    libjpeg-dev /
-    libffi-dev /
-    libpng-dev /
-    libz-dev /
+RUN apt-get update && apt-get install -y \
+    libcairo2-dev \
+    libfreetype6-dev \
+    libjpeg-dev \
+    libffi-dev \
+    libpng-dev \
+    libz-dev \
     pngquant
 RUN poetry config virtualenvs.create false
 RUN poetry install -n --with docs