diff --git a/Dockerfile b/Dockerfile
index c11a15f..5742b1c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM docker.io/ubuntu:22.04
 
 # Install node.js, Caddy as proxy server, and java.
 RUN apt-get update && \
diff --git a/devenv/docker-compose.yml b/devenv/docker-compose.yml
index 9ba4c33..5394a0a 100644
--- a/devenv/docker-compose.yml
+++ b/devenv/docker-compose.yml
@@ -2,7 +2,7 @@
 version: "3.0"
 services:
   gstore:
-    image: dbpedia/gstore:dev #dbpedia/gstore:dev
+    image: docker.io/dbpedia/gstore:dev
     container_name: devenv_gstore
     environment: 
       STORAGE_USER: "dba"
@@ -15,7 +15,7 @@ services:
       - ./data/gstore/git:/gstore/git
       - ./data/gstore/logs:/gstore/logs
   virtuoso:
-    image: "openlink/virtuoso-opensource-7:latest"
+    image: "docker.io/openlink/virtuoso-opensource-7:latest"
     container_name: devenv_virtuoso
     environment:
       DBA_PASSWORD: "everyoneknows"
diff --git a/docs/guides/data-download-guide.md b/docs/guides/data-download-guide.md
index bc7a293..f522c02 100644
--- a/docs/guides/data-download-guide.md
+++ b/docs/guides/data-download-guide.md
@@ -240,7 +240,7 @@ version: '3.5'
 services:
 
   db:
-    image: tenforce/virtuoso
+    image: docker.io/tenforce/virtuoso
     ports:
       - 8895:8890
     volumes:
@@ -254,7 +254,7 @@ services:
   # and apply internal path as environment variable.
 
   databus_client:
-    image: dbpedia/databus-client:latest
+    image: docker.io/dbpedia/databus-client:latest
     environment:
       - SOURCE=/databus-client/query.sparql
       - ENDPOINT=https://dev.databus.dbpedia.org/sparql
diff --git a/docs/running-your-own-databus-server/https-and-proxy-setup.md b/docs/running-your-own-databus-server/https-and-proxy-setup.md
index d4e97c9..1643f47 100644
--- a/docs/running-your-own-databus-server/https-and-proxy-setup.md
+++ b/docs/running-your-own-databus-server/https-and-proxy-setup.md
@@ -11,7 +11,7 @@ In the `.env` file the `DATABUS_PROXY_SERVER_ENABLE` needs to be set to `true` a
 ```
 services:
   databus:
-    image: "dbpedia/databus"
+    image: "docker.io/dbpedia/databus"
     ports:
   ... 
 #      - 80:80       # ** uncomment if proxy enabled only** HTTP port of included proxy (caddy) necessary for Auto-HTTPS via ACME and HTTP->HTTPS redirect
diff --git a/search/Dockerfile b/search/Dockerfile
index 0effd22..eda7c9d 100644
--- a/search/Dockerfile
+++ b/search/Dockerfile
@@ -1,4 +1,4 @@
-FROM tomcat:9.0.35-jdk11-openjdk
+FROM docker.io/tomcat:9.0.35-jdk11-openjdk
 
 COPY ./lookup-application.war /usr/local/tomcat/webapps/
 ENTRYPOINT [ "/usr/local/tomcat/bin/catalina.sh" ]