diff --git a/Dockerfile b/Dockerfile
index 9ce7ba5..0113ae0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -68,11 +68,11 @@ RUN apk --no-cache add \
     lua \
     lua-ldap
 
-RUN addgroup -g 100 dovecot
-RUN adduser -u 90 -h /dev/null -H -s /sbin/nologin -D -G dovecot dovecot
+RUN addgroup -g 150 dovecot
+RUN adduser -u 140 -h /dev/null -H -s /sbin/nologin -D -G dovecot dovecot
 
-RUN addgroup -g 101 dovenull
-RUN adduser -u 91 -h /dev/null -H -s /sbin/nologin -D -G dovenull dovenull
+RUN addgroup -g 151 dovenull
+RUN adduser -u 141 -h /dev/null -H -s /sbin/nologin -D -G dovenull dovenull
 
 RUN addgroup -g 2222 access
 RUN addgroup dovecot access