diff --git a/admin/Dockerfile b/admin/Dockerfile
index b7413ea2..9c20afa4 100644
--- a/admin/Dockerfile
+++ b/admin/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx
+FROM nginx:1.21.1
 
 # remove the config
 RUN rm /etc/nginx/conf.d/default.conf && \
diff --git a/myems-aggregation/Dockerfile b/myems-aggregation/Dockerfile
index 7775d19c..a7747927 100644
--- a/myems-aggregation/Dockerfile
+++ b/myems-aggregation/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9.6
 WORKDIR /code
 
 COPY . /code
diff --git a/myems-api/Dockerfile b/myems-api/Dockerfile
index ef1da61d..4511aece 100644
--- a/myems-api/Dockerfile
+++ b/myems-api/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9.6
 WORKDIR /code
 
 COPY . /code
diff --git a/myems-cleaning/Dockerfile b/myems-cleaning/Dockerfile
index 7775d19c..a7747927 100644
--- a/myems-cleaning/Dockerfile
+++ b/myems-cleaning/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9.6
 WORKDIR /code
 
 COPY . /code
diff --git a/myems-modbus-tcp/Dockerfile b/myems-modbus-tcp/Dockerfile
index 7775d19c..a7747927 100644
--- a/myems-modbus-tcp/Dockerfile
+++ b/myems-modbus-tcp/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9.6
 WORKDIR /code
 
 COPY . /code
diff --git a/myems-normalization/Dockerfile b/myems-normalization/Dockerfile
index 7775d19c..a7747927 100644
--- a/myems-normalization/Dockerfile
+++ b/myems-normalization/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9.6
 WORKDIR /code
 
 COPY . /code
diff --git a/web/Dockerfile b/web/Dockerfile
index f3622246..08c6b24c 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx
+FROM nginx:1.21.1
 
 # remove the config
 RUN rm /etc/nginx/conf.d/default.conf && \