diff --git a/docker-compose.yml b/docker-compose.yml
index ae76f55..242a79f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -18,4 +18,5 @@ services:
       - ALL
     security_opt:
       - no-new-privileges:true
-    
\ No newline at end of file
+    environment:
+      - OPENAI_API_KEY=${OPENAI_API_KEY:-}
diff --git a/generate_welcome_page.py b/generate_welcome_page.py
index aaa9133..851a32c 100644
--- a/generate_welcome_page.py
+++ b/generate_welcome_page.py
@@ -21,9 +21,7 @@ WELCOME_FILENAME = "welcome.html"
 # -------------------------------------------------
 
 def get_openai_client():
-    """Initialisiert den OpenAI-Client mit dem API-Key.
-       Der Key ist aktuell direkt im Code hinterlegt – sollte in env var ausgelagert werden."""
-    api_key = "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"
+    api_key = os.environ.get("OPENAI_API_KEY")
     if not api_key:
         raise ValueError("OPENAI_API_KEY environment variable not set")
     return OpenAI(api_key=api_key)