diff --git a/Dockerfile b/Dockerfile
index 093dcf6..f391a52 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ ARG VERSION
 
 RUN apk --no-cache add --virtual build-dependencies build-base && \
     pip install --no-cache-dir troposphere && \
-    apk del build-dependencies
+    apk --no-cache del build-dependencies
 
 # TODO : vérifier les labels
 LABEL "maintainer"="dockerimages@cabillot.eu" \