diff --git a/docs/BuildPrerequisites.md b/docs/BuildPrerequisites.md
index 04dda68..fccd240 100644
--- a/docs/BuildPrerequisites.md
+++ b/docs/BuildPrerequisites.md
@@ -4,7 +4,7 @@ Run the following commands to install build tools required by the PiPedal build.
 
     # install CMake
     sudo apt update
-    sudo apt install cmake ninja-build
+    sudo apt install -y cmake ninja-build
 
 The PiPedal build process also requires version 12 or later of `node.js`. Type `node --version` to see if you have a version 
 of `node.js` installed already. Otherwise run the following commands as root to install the v14.x lts version of `node.js`: 
@@ -22,10 +22,10 @@ with
 Run the following commands to install dependent libraries required by the PiPedal build.
 
     sudo apt update
-    sudo apt install liblilv-dev libboost-dev jackd2 libjack-jackd2-dev libnl-3-dev libnl-genl-3-dev libsystemd-dev catch
-    sudo apt install libasound2-dev jackd2 uuid-dev
-    sudo apt install libwebsocketpp-dev authbind
-    sudo apt install libavahi-client-dev
+    sudo apt install -y liblilv-dev libboost-dev jackd2 libjack-jackd2-dev libnl-3-dev libnl-genl-3-dev libsystemd-dev catch
+    sudo apt install -y libasound2-dev jackd2 uuid-dev
+    sudo apt install -y libwebsocketpp-dev authbind
+    sudo apt install -y libavahi-client-dev
 
 ### Installing Sources