diff --git a/tools/building.py b/tools/building.py
index d762304920a90..c1caf75ca6840 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -39,7 +39,7 @@
 
 #  Building
 binaryen_checked = False
-EXPECTED_BINARYEN_VERSION = 120
+EXPECTED_BINARYEN_VERSION = 121
 
 _is_ar_cache: Dict[str, bool] = {}
 # the exports the user requested