diff --git a/.dockerfile b/.dockerfile
index 3b97424..e2ceb7f 100644
--- a/.dockerfile
+++ b/.dockerfile
@@ -44,7 +44,7 @@ RUN apk add --no-cache --update \
 	git \
 	pass gnupg \
 	\
-	python3 py3-pip \
+	python3 python3-dev py3-pip \
 	alpine-sdk
 
 # create user