diff --git a/Dockerfile b/Dockerfile
index fd9c004..a39276a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,10 +27,10 @@ RUN flit install --pth-file
 
 # switch back to root to remove header files
 USER root
-RUN apk delete python3-dev
-RUN apk delete libc-dev
-RUN apk delete libffi-dev
-RUN apk delete openssl-dev
+RUN apk del python3-dev
+RUN apk del libc-dev
+RUN apk del libffi-dev
+RUN apk del openssl-dev
 
 # switch to the created user to run the application
 USER deploy