diff --git a/Base/Dockerfile b/Base/Dockerfile
index f725bf83ab6a8ec04684a00886a0fd6439179f77..3744c0557079d3af998610f7673c3bea9505a23a 100644
--- a/Base/Dockerfile
+++ b/Base/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM --platform=linux/amd64 ubuntu:20.04
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 #----------------------
diff --git a/BasicDesktop/Dockerfile b/BasicDesktop/Dockerfile
index 8302669b511406f80bba07a42826ab5543d18995..981ae833afd31dd999192f2babafeea76e9a534f 100644
--- a/BasicDesktop/Dockerfile
+++ b/BasicDesktop/Dockerfile
@@ -1,4 +1,4 @@
-FROM minimaldesktop
+FROM --platform=linux/amd64 minimaldesktop
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root
diff --git a/JupyterNotebook/Dockerfile b/JupyterNotebook/Dockerfile
index a41065a8b434c89b152a1c09bbfdfa5bda8c621a..46b6043155157f6a06c8863de7c531afb5639a53 100644
--- a/JupyterNotebook/Dockerfile
+++ b/JupyterNotebook/Dockerfile
@@ -1,4 +1,4 @@
-FROM base
+FROM --platform=linux/amd64 base
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root
diff --git a/MinimalDesktop/Dockerfile b/MinimalDesktop/Dockerfile
index b35d31066ba6c915b324db50dcfcbfd9afc21588..29e2a7d466555e2a4aeb83283d7912e3d8f99ec3 100644
--- a/MinimalDesktop/Dockerfile
+++ b/MinimalDesktop/Dockerfile
@@ -1,4 +1,4 @@
-FROM x11web
+FROM --platform=linux/amd64 x11web
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root
diff --git a/SSH/Dockerfile b/SSH/Dockerfile
index 01074451e92cb4b1dfeb3f6ad25e3bd2ae145c89..aeb2b44a6846395420ff18ccbba543f395bfc639 100644
--- a/SSH/Dockerfile
+++ b/SSH/Dockerfile
@@ -1,4 +1,4 @@
-FROM base
+FROM --platform=linux/amd64 base
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root
diff --git a/X11Web/Dockerfile b/X11Web/Dockerfile
index 95e9aa0ae777675080a28db522988deefae7fa09..579aec5204befca112dd8d6f0d2abf5be0100bda 100644
--- a/X11Web/Dockerfile
+++ b/X11Web/Dockerfile
@@ -1,4 +1,4 @@
-FROM base
+FROM --platform=linux/amd64 base
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root
diff --git a/XCalc/Dockerfile b/XCalc/Dockerfile
index 181b33dc65c7026d71307229785a1e124425e746..d8dbce3f0864a9bdfe32a1b69e643984854af63b 100644
--- a/XCalc/Dockerfile
+++ b/XCalc/Dockerfile
@@ -1,4 +1,4 @@
-FROM ssh
+FROM --platform=linux/amd64 ssh
 MAINTAINER Stefano Alberto Russo <stefano.russo@inaf.it>
 
 # Switch to root