diff --git a/README.md b/README.md
index be7ad44..071587b 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@
 
 ```bash
 # check version with apt
-sudo apt show tmux 2> /dev/null | grep Version:
+sudo apt show -a tmux 2> /dev/null | grep Version:
 
 # if your apt repositories deliver at least 3.3, you can install it
 sudo apt install tmux
@@ -86,7 +86,7 @@ wget -c -nv "$_URL" -O - | sudo tar --no-same-owner -xzv -C /usr/local/bin gitmu
 
 ```bash
 # check version with apt
-sudo apt show fzf 2> /dev/null | grep Version:
+sudo apt show -a fzf 2> /dev/null | grep Version:
 
 # if your apt repositories deliver at least 0.35, you can install it
 sudo apt install fzf