diff --git a/backend/Dockerfile b/backend/Dockerfile
index a67f14b8d..9c32e83d5 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:lts-alpine as base
+FROM node:12.19.0-alpine3.10 as base
 LABEL Description="Backend of the Social Network Human-Connection.org" Vendor="Human Connection gGmbH" Version="0.0.1" Maintainer="Human Connection gGmbH (developer@human-connection.org)"
 
 EXPOSE 4000
diff --git a/webapp/Dockerfile b/webapp/Dockerfile
index aa64faae2..fb0489476 100644
--- a/webapp/Dockerfile
+++ b/webapp/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:lts-alpine as base
+FROM node:12.19.0-alpine3.10 as base
 LABEL Description="Web Frontend of the Social Network Human-Connection.org" Vendor="Human-Connection gGmbH" Version="0.0.1" Maintainer="Human-Connection gGmbH (developer@human-connection.org)"
 
 EXPOSE 3000
diff --git a/webapp/Dockerfile.maintenance b/webapp/Dockerfile.maintenance
index 222d03945..dfa392b24 100644
--- a/webapp/Dockerfile.maintenance
+++ b/webapp/Dockerfile.maintenance
@@ -1,4 +1,4 @@
-FROM node:lts-alpine as build
+FROM node:12.19.0-alpine3.10 as build
 LABEL Description="Maintenance page of the Social Network Human-Connection.org" Vendor="Human-Connection gGmbH" Version="0.0.1" Maintainer="Human-Connection gGmbH (developer@human-connection.org)"
 
 EXPOSE 3000