diff --git a/src/bricksetapi.py b/src/bricksetapi.py
index 5d427a9..2139931 100644
--- a/src/bricksetapi.py
+++ b/src/bricksetapi.py
@@ -48,7 +48,7 @@ def get_set(set_number: int) -> dict:
         }
         # add PW 10% b4 tax
         our_set.update(
-            {"set_adjustredprice": our_set + ((10 / 100) * our_set["set_retailprice"])}
+            {"set_adjustredprice": our_set["set_retailprice"] + ((10 / 100) * our_set["set_retailprice"])}
         )
         our_set["pw_name"] = (
             f"{our_set['set_num']} - {our_set["set_theme"].upper()} {our_set['set_name']}"