diff --git a/base-16.04/Dockerfile b/base-16.04/Dockerfile
index efce5531d36551947f7133e9fa70f32dd09d8346..d460ef64af646924156ea72a97c1b1862ba94ef1 100644
--- a/base-16.04/Dockerfile
+++ b/base-16.04/Dockerfile
@@ -36,7 +36,7 @@ RUN apt-get update && apt-get dist-upgrade --no-install-recommends --yes \
   python-dev \
   python3 \
   && apt-get clean && rm -rf /var/lib/apt/lists/*
-RUN adduser --disabled-password --home /duneci duneci
+RUN adduser --disabled-password --home /duneci --uid 50000 duneci
 USER duneci
 WORKDIR /duneci
 RUN mkdir -p /duneci/bin /duneci/modules
diff --git a/base-16.10/Dockerfile b/base-16.10/Dockerfile
index f773dd11aee9564fbf2250766920ad206efd7aef..3bd0da8697ae9f6dce241ff167b02724f69c5432 100644
--- a/base-16.10/Dockerfile
+++ b/base-16.10/Dockerfile
@@ -36,7 +36,7 @@ RUN apt-get update && apt-get dist-upgrade --no-install-recommends --yes \
   python-dev \
   python3 \
   && apt-get clean && rm -rf /var/lib/apt/lists/*
-RUN adduser --disabled-password --home /duneci duneci
+RUN adduser --disabled-password --home /duneci --uid 50000 duneci
 USER duneci
 WORKDIR /duneci
 RUN mkdir -p /duneci/bin /duneci/modules
diff --git a/base-8/Dockerfile b/base-8/Dockerfile
index 65d179a6d17420b20452b56e6b542894a43b8833..75670a5e04ee8f517aa3738a743769d1856ded35 100644
--- a/base-8/Dockerfile
+++ b/base-8/Dockerfile
@@ -36,7 +36,7 @@ RUN apt-get update && apt-get dist-upgrade --no-install-recommends --yes \
   python-dev \
   python3 \
   && apt-get clean && rm -rf /var/lib/apt/lists/*
-RUN adduser --disabled-password --home /duneci duneci
+RUN adduser --disabled-password --home /duneci --uid 50000 duneci
 USER duneci
 WORKDIR /duneci
 RUN mkdir -p /duneci/bin /duneci/modules
diff --git a/base-9/Dockerfile b/base-9/Dockerfile
index 4b281af80b64e42f855a1da2c7e4e077d763c052..cfcdfdb3b76f80335f683e105a7cf46199eaff3b 100644
--- a/base-9/Dockerfile
+++ b/base-9/Dockerfile
@@ -36,7 +36,7 @@ RUN apt-get update && apt-get dist-upgrade --no-install-recommends --yes \
   python-dev \
   python3 \
   && apt-get clean && rm -rf /var/lib/apt/lists/*
-RUN adduser --disabled-password --home /duneci duneci
+RUN adduser --disabled-password --home /duneci --uid 50000 duneci
 USER duneci
 WORKDIR /duneci
 RUN mkdir -p /duneci/bin /duneci/modules