diff --git a/apps/tmbitwarden.sh b/apps/tmbitwarden.sh
index b631b979..a870ef51 100644
--- a/apps/tmbitwarden.sh
+++ b/apps/tmbitwarden.sh
@@ -7,7 +7,6 @@ true
 # shellcheck source=lib.sh
 . <(curl -sL https://raw.githubusercontent.com/nextcloud/vm/master/lib.sh)
 
-print_text_in_color "$ICyan" "Installing Bitwarden password manager..."
 
 # Check for errors + debug code and abort if something isn't right
 # 1 = ON
@@ -18,6 +17,25 @@ debug_mode
 # Check if root
 root_check
 
+# Check if Bitwarden is already installed
+print_text_in_color "$ICyan" "Checking if Bitwarden is already installed..."
+if [ "$(docker ps -a >/dev/null 2>&1 && echo yes || echo no)" == "yes" ]
+then
+    if docker ps -a --format '{{.Names}}' | grep -Eq "bitwarden";
+    then
+        if is_this_installed apache2
+        then
+            if [ -d /root/bwdata ]
+            then
+                msg_box "It seems like 'Bitwarden' is already installed.\n\nYou cannot run this script twice, because you would loose all your passwords."
+                exit 1
+            fi
+        fi
+    fi
+fi
+
+print_text_in_color "$ICyan" "Installing Bitwarden password manager..."
+
 msg_box "Bitwarden is a password manager that is seperate from Nextcloud, though we provide this service because it's self hosted and secure.
 
 If you just want to run Bitwarden locally (not connecting your smartphone) then you can use 'localhost' as domain.
@@ -37,7 +55,8 @@ msg_box "The necessary preparations to run expose Bitwarden to the internet are:
 if [[ "no" == $(ask_yes_or_no "Have you made the necessary preparations?") ]]
 then
 msg_box "OK, please do the necessary preparations before you run this script and then simply run it again once you're done.
-The script is located at: $SCRIPTS/apps/tmbitwarden.sh"
+
+To run this script again, execute $SCRIPTS/apps.sh and choose Bitwarden"
     exit
 else
     sleep 0.1
@@ -74,3 +93,5 @@ fi
 
 # Start Apache2
 check_command systemctl start apache2.service
+
+exit