diff --git a/Dockerfile b/Dockerfile
index 9e64cf4..4e9cbde 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,11 @@
 FROM python:3.7
 
+# Install pdftotext
+RUN set -x; \
+    apt update && \
+    apt install -y poppler-utils && \
+    rm -rf /var/lib/apt/lists/*
+
 WORKDIR /usr/src/pylokid
 COPY requirements.txt ./
 RUN pip install --no-cache-dir -r requirements.txt