diff --git a/src/main.py b/src/main.py
index 3fd9bbd..9402a25 100644
--- a/src/main.py
+++ b/src/main.py
@@ -30,14 +30,23 @@ async def on_ready():
 @app_commands.describe(
     prompt="What should be generated?",
     undesired_prompt="What should be avoided? (optional)",
-    orientation="portrait or landscape (Standard: portrait)"
+    orientation="portrait or landscape (Standard: portrait)",
+    seed="Optional seed (integer). If empty, a random one will be generated"
 )
 async def generate(
     interaction: discord.Interaction,
     prompt: str,
     undesired_prompt: str = "",
-    orientation: str = "portrait"
+    orientation: str = "portrait",
+    seed: int = None
 ):
+    
+    default_negative = (
+        "blurry, lowres, error, film grain, scan artifacts, worst quality, bad quality, jpeg artifacts, "
+        "very displeasing, chromatic aberration, multiple views, logo, too many watermarks, white blank page, "
+        "blank page, watermarks, watermark, text, "
+    )
+    
     if interaction.channel.id != ALLOWED_CHANNEL_ID:
         await interaction.response.send_message(
             "This command isn't allowed here.",
@@ -51,7 +60,7 @@ async def generate(
         await interaction.followup.send(f"Prompt too long! Maximum {MAX_PROMPT_LENGTH} chars allowed.")
         return
 
-    if len(negative) > MAX_PROMPT_LENGTH:
+    if len(default_negative + undesired_prompt.strip()) > MAX_PROMPT_LENGTH:
         await interaction.followup.send(f"Negative Prompt too long! Maximum {MAX_PROMPT_LENGTH} chars allowed.")
         return
 
@@ -63,13 +72,8 @@ async def generate(
     else:
         width, height = 832, 1216
 
-    default_negative = (
-        "blurry, lowres, error, film grain, scan artifacts, worst quality, bad quality, jpeg artifacts, "
-        "very displeasing, chromatic aberration, multiple views, logo, too many watermarks, white blank page, "
-        "blank page, watermarks, watermark, text, "
-    )
-
-    seed = random.randint(0, 2**32 - 1)
+    if seed is None:
+        seed = random.randint(0, 2**32 - 1)
 
     # API-Payload zusammenbauen
     payload = {