diff --git a/tools/building.py b/tools/building.py
index 25b873c4f5ea..7c3d496d9abb 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -38,7 +38,7 @@
 
 #  Building
 binaryen_checked = False
-EXPECTED_BINARYEN_VERSION = 110
+EXPECTED_BINARYEN_VERSION = 111
 
 # cache results of nm - it can be slow to run
 nm_cache = {}