diff --git a/Dockerfile.moth-devel b/Dockerfile.moth-devel
index 35a980f..20c659a 100644
--- a/Dockerfile.moth-devel
+++ b/Dockerfile.moth-devel
@@ -1,6 +1,7 @@
 FROM python:3.7.2-alpine3.8
 
 RUN apk --no-cache add \
+      freetype-dev \
       gcc \
       musl-dev \
       jpeg-dev \