diff --git a/README.md b/README.md
index 8b55f8e..df87d1f 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ This allows you to repeat execution steps by outputting a list of integers, whic
 ## Features
 
 - **For Loop (Count)**: Simple loop that runs `N` times. outputs `0` to `N-1`.
-- **For Loop (Range)**: Loop based on python `range(start, stop, step)`.
+- **For Loop (Range)**: Loop based on python `range(start, stop, step)` (negative values and descending loops supported, except `step=0`).
 
 ## Installation
 
diff --git a/loop_node.py b/loop_node.py
index 9037ecd..d665c78 100644
--- a/loop_node.py
+++ b/loop_node.py
@@ -28,9 +28,9 @@ class SimpleForLoopRange:
     def INPUT_TYPES(s):
         return {
             "required": {
-                "start": ("INT", {"default": 0, "min": 0, "max": 10000, "step": 1}),
-                "stop": ("INT", {"default": 10, "min": 0, "max": 10000, "step": 1}),
-                "step": ("INT", {"default": 1, "min": 1, "max": 10000, "step": 1}),
+                "start": ("INT", {"default": 0, "min": -10000, "max": 10000, "step": 1}),
+                "stop": ("INT", {"default": 10, "min": -10000, "max": 10000, "step": 1}),
+                "step": ("INT", {"default": 1, "min": -10000, "max": 10000, "step": 1}),
             }
         }
     
@@ -41,5 +41,7 @@ class SimpleForLoopRange:
     CATEGORY = "Loop"
 
     def execute(self, start, stop, step):
+        if step == 0:
+            raise ValueError("step must not be 0")
         range_vals = list(range(start, stop, step))
         return (range_vals,)