diff --git a/Dockerfile b/Dockerfile
index 925bc96..96d10cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,6 +16,11 @@ ENV DEPOT_ID=996562
 # Set a specific manifest ID to download an older version of the server, defaults to latest version
 ENV MANIFEST_ID=7306793446776857728
 
+# Steam credentials
+ENV STEAM_USER=anonymous
+ENV STEAM_PASSWORD=""
+ENV STEAM_GUARD_CODE=""
+
 # Install dependencies
 RUN apt-get update && \
     apt-get install -y libicu-dev gosu && \
diff --git a/README.md b/README.md
index 6185c31..c3f4eda 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,10 @@ services:
       # To use a specific server version, uncomment the next line and set a manifest ID.
       # See the "Using an Older Server Version" section for details.
       # - MANIFEST_ID=none
+      # If you need to use your own Steam credentials, uncomment and set the following variables.
+      # - STEAM_USER=your_steam_username
+      # - STEAM_PASSWORD=your_steam_password
+      # - STEAM_GUARD_CODE=your_2fa_code
     restart: unless-stopped
 ```
 
@@ -65,6 +69,10 @@ docker run -d \
   # To use a specific server version, uncomment the next line and set a manifest ID.
   # See the "Using an Older Server Version" section for details.
   # -e MANIFEST_ID=none \
+  # If you need to use your own Steam credentials, uncomment and set the following variables.
+  # -e STEAM_USER=your_steam_username \
+  # -e STEAM_PASSWORD=your_steam_password \
+  # -e STEAM_GUARD_CODE=your_2fa_code \
   --restart unless-stopped \
   greenmatthew/scp-secret-laboratory-server:latest
 ```
@@ -87,6 +95,9 @@ Mounting the .config directory allows you to configure any server setting and ha
 - `TZ`: [Timezone identifier](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List) for the container (default: Etc/UTC). Examples: `America/Chicago`, `Europe/London`, `Asia/Tokyo`
 - `DEPOT_ID`: The Steam Depot ID for the server files (default: `996562`). This generally should not be changed.
 - `MANIFEST_ID`: The Steam Manifest ID for a specific server version (default: `none`). See the "Using an Older Server Version" section for details.
+- `STEAM_USER`: Your Steam username (default: `anonymous`).
+- `STEAM_PASSWORD`: Your Steam password (default: `""`).
+- `STEAM_GUARD_CODE`: The 2FA code from your authenticator app (default: `""`). Only needed if your account has Steam Guard enabled.
 
 ## Using an Older Server Version
 
diff --git a/compose.yaml b/compose.yaml
index 654f759..ff818ee 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -15,4 +15,8 @@ services:
       # - TZ=Etc/UTC
       # To download a specific version of the server, uncomment the next line and set the value to a valid manifest ID.
       # - MANIFEST_ID=none
+      # If you need to use your own Steam credentials, uncomment and set the following variables.
+      # - STEAM_USER=your_steam_username
+      # - STEAM_PASSWORD=your_steam_password
+      # - STEAM_GUARD_CODE=your_2fa_code
     restart: unless-stopped
diff --git a/start.sh b/start.sh
index 7857b31..302f21a 100644
--- a/start.sh
+++ b/start.sh
@@ -6,12 +6,12 @@ echo "Current user is: $(whoami)"
 # Install/update SCP:SL server
 if [ "$MANIFEST_ID" = "none" ]; then
     echo "MANIFEST_ID not set, downloading latest server version..."
-    steamcmd +force_install_dir $SERVER_DIR +login anonymous +app_update 996560 validate +quit
+    steamcmd +force_install_dir $SERVER_DIR +login "$STEAM_USER" "$STEAM_PASSWORD" "$STEAM_GUARD_CODE" +app_update 996560 validate +quit
 else
     echo "MANIFEST_ID set to $MANIFEST_ID, downloading specific server version..."
     # download_depot downloads to a specific folder, not the one specified by force_install_dir
     # It will be downloaded to <install_dir>/steamapps/content/app_<id>/depot_<id>
-    steamcmd +login anonymous +download_depot 996560 $DEPOT_ID $MANIFEST_ID +quit
+    steamcmd +login "$STEAM_USER" "$STEAM_PASSWORD" "$STEAM_GUARD_CODE" +download_depot 996560 $DEPOT_ID $MANIFEST_ID +quit
 
     DEPOT_DOWNLOAD_DIR="$INSTALL_DIR/steamapps/content/app_996560/depot_$DEPOT_ID"