diff --git a/engine/installation/linux/debian.md b/engine/installation/linux/debian.md
index 08e8df7f3b..86e86585ea 100644
--- a/engine/installation/linux/debian.md
+++ b/engine/installation/linux/debian.md
@@ -94,7 +94,7 @@ Docker from the repository.
 2.  Add Docker's official GPG key:
 
     ```bash
-    $ curl -s http://yum.dockerproject.org/gpg | sudo apt-key add -
+    $ curl -fsSL https://yum.dockerproject.org/gpg | sudo apt-key add -
     ```
 
     > **Note**: The URL is correct, even for Linux distributions that use `APT`.
diff --git a/engine/installation/linux/ubuntu.md b/engine/installation/linux/ubuntu.md
index 3683b0cd38..4045dcbf45 100644
--- a/engine/installation/linux/ubuntu.md
+++ b/engine/installation/linux/ubuntu.md
@@ -71,7 +71,7 @@ Docker from the repository.
 2.  Add Docker's official GPG key:
 
     ```bash
-    $ curl -s http://yum.dockerproject.org/gpg | sudo apt-key add -
+    $ curl -fsSL https://yum.dockerproject.org/gpg | sudo apt-key add -
     ```
 
     > **Note**: The URL is correct, even for Linux distributions that use `APT`.