diff --git a/dockercoins/rng/Dockerfile b/dockercoins/rng/Dockerfile
index 5639e605..34cf43b2 100644
--- a/dockercoins/rng/Dockerfile
+++ b/dockercoins/rng/Dockerfile
@@ -1,4 +1,4 @@
-FROM python
+FROM python:alpine
 RUN pip install Flask
 COPY rng.py /
 CMD ["python", "rng.py"]
diff --git a/dockercoins/webui/Dockerfile b/dockercoins/webui/Dockerfile
index 430e0ec0..5e8c9be6 100644
--- a/dockercoins/webui/Dockerfile
+++ b/dockercoins/webui/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:4
+FROM node:4-slim
 RUN npm install express
 RUN npm install redis
 COPY files/ /files/
diff --git a/dockercoins/worker/Dockerfile b/dockercoins/worker/Dockerfile
index 429b3c7f..cfdc0747 100644
--- a/dockercoins/worker/Dockerfile
+++ b/dockercoins/worker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python
+FROM python:alpine
 RUN pip install redis
 RUN pip install requests
 COPY worker.py /