diff --git a/hasher/Dockerfile b/hasher/Dockerfile
index 62be928..62d484a 100644
--- a/hasher/Dockerfile
+++ b/hasher/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:alpine
+FROM ruby:3-alpine
 RUN apk add --update build-base curl
 RUN gem install sinatra
 RUN gem install thin
diff --git a/rng/Dockerfile b/rng/Dockerfile
index 34cf43b..c63b0e9 100644
--- a/rng/Dockerfile
+++ b/rng/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:alpine
+FROM python:3-alpine
 RUN pip install Flask
 COPY rng.py /
 CMD ["python", "rng.py"]
diff --git a/worker/Dockerfile b/worker/Dockerfile
index 8b9a74b..9cf64d9 100644
--- a/worker/Dockerfile
+++ b/worker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:alpine
+FROM python:3-alpine
 RUN pip install influxdb
 RUN pip install requests
 COPY worker.py /