diff --git a/src/ffx/ffx_controller.py b/src/ffx/ffx_controller.py
index d142860..4d78ae6 100644
--- a/src/ffx/ffx_controller.py
+++ b/src/ffx/ffx_controller.py
@@ -197,10 +197,10 @@ class FfxController():
         if cropArguments:
 
             cropParams = (f"crop="
-                            + f"{CropFilter.OUTPUT_WIDTH_KEY}"
-                            + f":{CropFilter.OUTPUT_HEIGHT_KEY}"
-                            + f":{CropFilter.OFFSET_X_KEY}"
-                            + f":{CropFilter.OFFSET_Y_KEY}")
+                            + f"{cropArguments[CropFilter.OUTPUT_WIDTH_KEY]}"
+                            + f":{cropArguments[CropFilter.OUTPUT_HEIGHT_KEY]}"
+                            + f":{cropArguments[CropFilter.OFFSET_X_KEY]}"
+                            + f":{cropArguments[CropFilter.OFFSET_Y_KEY]}")
     
             filterParamTokens.append(cropParams)